A55M-A - Motherboard ASUS - Free user manual and instructions

USER MANUAL A55M-A ASUS

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Contents

Safety information......vi

About this guide....vii

A55M-A Series specifications summary ix

Package contents....xi

Product introduction

1.1 Special features ...... 1-1

1.1.1 Product highlights 1-1
1.1.2 ASUS DIGI+ VRM 1-1
1.1.3 ASUS Exclusive Features 1-2

1.2 Before you proceed 1-4

1.3 Motherboard overview 1-5

1.3.1 Placement direction 1-5
1.3.2 Screw holes 1-5
1.3.3 Motherboard layout 1-6
1.3.4 Layout contents 1-7

1.4 Accelerated Processing Unit (APU) 1-7

1.4.1 APU installation 1-8
1.4.2 APU heatsink and fan assembly installation 1-9

1.5 System memory 1-11

1.5.1 Overview 1-11
1.5.2 Memory configurations 1-12
1.5.3 Installing a DIMM 1-17

1.6 Expansion slots 1-18

1.6.1 Installing an expansion card 1-18
1.6.2 Configuring an expansion card 1-18
1.6.3 PCI slot 1-18
1.6.4 PCI Express x1 slot 1-18
1.6.5 PCI Express x16 slot 1-18

1.7 Jumpers 1-20

1.8 Connectors 1-22

1.8.1 Rear panel ports 1-22
1.8.2 Internal connectors 1-23

1.9 Software support 1-29

1.9.1 Installing an operating system 1-29
1.9.2 Support DVD information 1-29

BIOS information

2.1 Managing and updating your BIOS 2-1

2.1.1 ASUS Update utility 2-1
2.1.2 ASUS EZ Flash 2 2-2
2.1.3 ASUS CrashFree BIOS 3 utility 2-3
2.1.4 ASUS BIOS Updater 2-4

2.2 BIOS setup program 2-6

2.3 Main menu 2-10

2.3.1 System Language [English] 2-10
2.3.2 System Date [Day xx/xx/xxxx] 2-10
2.3.3 System Time [xx:xx:xx] 2-10
2.3.4 Security 2-10

2.4 Ai Tweaker menu 2-12

2.4.1 Ai Overclock Tuner [Auto] 2-13
2.4.2 Memory Frequency [Auto] 2-13
2.4.3 APU Multiplier [Auto] 2-13
2.4.4 NB Frequency [Auto] 2-13
2.4.5 EPU Power Saving Mode [Disabled] 2-13
2.4.6 DRAM Timing Control 2-14
2.4.7 APU Voltage [Offset Mode] 2-14
2.4.8 DRAM Voltage [Auto] 2-14
2.4.9 SB 1.1V Voltage [Auto] 2-14
2.4.10 DIGI+ VRM 2-15

2.5 Advanced menu 2-16

2.5.1 CPU Configuration....2-16
2.5.2 SATA Configuration....2-18
2.5.3 USB Configuration 2-19
2.5.4 NB Configuration....2-19
2.5.5 Onboard Devices Configuration 2-20
2.5.6 APM 2-21
2.5.7 Network Stack 2-22

2.6 Monitor menu 2-23

2.6.1 CPU Temperature / MB Temperature [xxx°C/xxx°F] 2-23
2.6.2 CPU / Chassis fan Speed [xxxx RPM] or [Ignore] / [N/A] 2-23
2.6.3 CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage ...... 2-23
2.6.4 CPU Q-Fan Control [Enabled] 2-23
2.6.5 Anti Surge Support [Auto] 2-24

2.7 Boot menu 2-25

2.7.1 Fast Boot [Enabled] 2-26
2.7.2 Full Screen Logo [Enabled] 2-26
2.7.3 Post Delay Time [3 sec] 2-27
2.7.4 Bootup NumLock State [On] 2-27
2.7.5 Wait for 'F1' If Error [Enabled] 2-27
2.7.6 Option ROM Messages [Force BIOS] 2-27
2.7.7 Interrupt 19 Capture [Postponed] 2-27
2.7.8 Setup Mode [EZ Mode] 2-27
2.7.9 CSM Parameters 2-28
2.7.10 Secure Boot 2-28
2.7.11 Boot Option Priorities 2-29
2.7.12 Boot Override 2-29

2.8 Tools menu 2-30

2.8.1 ASUS EZ Flash 2 Utility 2-30
2.8.2 ASUS SPD Information 2-30
2.8.3 ASUS O.C. Profile....2-30

2.9 Exit menu 2-31

Appendices

Notices ...... A-1

ASUS contact information.... A-3

Safety information

Electrical safety

• To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system.
- When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device.
- Before connecting or removing signal cables from the motherboard, ensure that all power cables are unplugged.
- Seek professional assistance before using an adapter or extension cord. These devices could interrupt the grounding circuit.
- Ensure that your power supply is set to the correct voltage in your area. If you are not sure about the voltage of the electrical outlet you are using, contact your local power company.
- If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer.

Operation safety

• Before installing the motherboard and adding devices on it, carefully read all the manuals that came with the package.
• Before using the product, ensure all cables are correctly connected and the power cables are not damaged. If you detect any damage, contact your dealer immediately.
• To avoid short circuits, keep paper clips, screws, and staples away from connectors, slots, sockets and circuitry.
• Avoid dust, humidity, and temperature extremes. Do not place the product in any area where it may become wet.
• Place the product on a stable surface.
• If you encounter technical problems with the product, contact a qualified service technician or your retailer.

About this guide

This user guide contains the information you need when installing and configuring the motherboard.

How this guide is organized

This guide contains the following parts:

• Chapter 1: Product introduction

This chapter describes the features of the motherboard and the new technology it supports.

• Chapter 2: BIOS information

This chapter tells how to change system settings through the BIOS Setup menus. Detailed descriptions of the BIOS parameters are also provided.

Where to find more information

Refer to the following sources for additional information and for product and software updates.

1. ASUS websites

The ASUS website provides updated information on ASUS hardware and software products. Refer to the ASUS contact information.

1. Optional documentation

Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer. These documents are not part of the standard package.

Conventions used in this guide

To ensure that you perform certain tasks properly, take note of the following symbols used throughout this manual.

DANGER/WARNING: Information to prevent injury to yourself when trying to complete a task.

CAUTION: Information to prevent damage to the components when trying to complete a task

IMPORTANT: Instructions that you MUST follow to complete a task.

NOTE: Tips and additional information to help you complete a task.

Typography

Bold text Indicates a menu or an item to select.

Italics

Used to emphasize a word or a phrase.

Keys enclosed in the less-than and greater-than sign

means that you must press the enclosed key.

Example: means that you must press the Enter or Return key.

+ + If you must press two or more keys simultaneously, the key names are linked with a plus sign (+).

A55M-A Series specifications summary

APU AMD Socket FM2 A-series/AthlonTM Series ProcessorsAMD® Turbo Core Technology 3.0 supportMicrosoft® DirectX® 11 supportRefer towww.asus.comfor the AMD® APU support list.
Chipset AMD	®A55 FCH (Hudson D2)
Memory 2 x 240-pin DIMM3 slots support maximum 32GB unbuffered non-ECC DDR3 1866 / 1600 / 1333 / 1066 MHz memory modulesDual-channel memory architectureSupports AMD Memory Profile (AMP) memoryThe maximum 32GB memory capacity can be supported with 16GB or above DIMMs. ASUS will update the memory QVL once the DIMMs are available in the market.Refer towww.asus.comfor the latest Memory QVL (Qualified Vendors List).When you install a total memory of 4GB capacity or more, Windows® 32-bit operating system may only recognize less than 3GB. We recommend a maximum of 3GB system memory if you are using a Windows® 32-bit operating system.
Graphics Integrated AMD	®RadeonTM HD 7000 Series Graphics in the A-Series APUSupports HDMI with a maximum resolution of 1920x1080@60HzSupports Dual-link DVI with a maximum resolution of 2560x1600@60HzSupports D-Sub with a maximum resolution of 1920x1600@60HzAMD® Dual Graphics technology support*Maximum shared memory of 2GBSupports Microsoft® DirectX 11Refer to http://www.amd.com/us/products/technologies/dual-graphics/Pages/dual-graphics.aspx#3for the discrete GPUs which support Dual Graphics technology.
Expansion slots 1 x PCIe 2.0 x16 slot1 x PCIe 2.0 x1 slots1 x PCI slot
Storage / RAID AMD	®A55 FCH:- 6 x Serial ATA 3.0Gb/s connectors support RAID 0, RAID 1, RAID 10 and JBOD configurations
LAN Realtek	®8111F PCIe Gigabit LAN controller
Audio Realtek	®ALC887-VD 8-channel High Definition Audio CODECUse a chassis with HD audio module in the front panel to support an 8-channel audio output.
USB A55M-A/USB3	ASMedia 1042- 2 x USB 3.0/2.0 ports at the back panelAMD® A55 FCH:- 6 x USB 2.0/1.1 ports (4 ports at the mid-board, 2 ports at the back panel)A55M-AAMD® A55 FCH:- 8 x USB 2.0/1.1 ports (4 ports at the mid-board, 4 ports at the back panel)

(continued on the next page)

A55M-A Series specifications summary

ASUS unique features	ASUS USB 3.0 Boost (A55M-A/USB3 only)DIGI+ Power Control: Digital Power Design for the APUASUS 3+2 Phase Power DesignNetwork iControlASUS EPUASUS AI Suite IIASUS UEFI BIOS EZ ModeASUS Anti-Surge ProtectionASUS Fan XpertASUS CrashFree BIOS 3ASUS Fanless Design: Stylish Heatsink SolutionASUS ESDASUS EZ Flash 2ASUS MyLogo 2^TM 100% All high-quality conductive polymer
Back Panel I/O ports	1 x PS/2 mouse port (green)1 x PS/2 keyboard port (purple)1 x HDMI port1 x DVI port1 x D-Sub output port1 x LAN (RJ-45) port2 x USB 3.0 ports and 2 x USB 2.0/1.1 ports (A55M-A/USB3 only)4 x USB 2.0/1.1 ports (A55M-A only)8-channel audio I/O ports (3-jack)
Internal I/O connectors / buttons / switches	2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports6 x SATA 3.0Gb/s connectors1 x System panel connector1 x Internal Speaker connector1 x CPU fan connector (4-pin)1 x S/PDIF output connector1 x Chassis fan connector (3-pin)1 x High-definition front panel audio connector1 x 24-pin EATX power connector1 x 4-pin ATX 12V power connector
BIOS 32 Mb Flash ROM,	UEFI AMI BIOS, PnP, DMI 2.0, WfM 2.0, SM BIOS2.6, ACPI 2.0a, Multi-language BIOS
Support DVD Drivers	ASUS UpdateASUS utilitiesAnti-Virus software (OEM version)
Form factor uATX form factor: 23.6cm x 18.8cm

Specifications are subject to change without notice.

Package contents

Check your motherboard package for the following items.

ASUS A55M-A Series motherboard		2 x Serial ATA 3.0 Gb/s cables
1 x I/O Shield User Guide Support DVD

• A55M-A Series motherboards include A55M-A and A55M-A/USB3 models. The package contents vary from models.
• If any of the above items is damaged or missing, contact your retailer.
• The illustrated items above are for reference only. Actual product specifications may vary with different models.

Product introduction

1.1 Special features

1.1.1 Product highlights

AMD® A-series accelerated processors with AMD® Radeon™ HD 7000 series graphics

This motherboard supports AMD ^® A-series accelerated processors with AMD ^® Radeon ^™ HD 7000 series graphics. This revolutionary APU (Accelerated Processing Unit) combines processing power and advanced DirectX 11 graphics in one small, energy-efficient design to enable accelerated performance and an industry-leading visual experience. It features Dual-channel DDR3 memory support and accelerated data transfer rates of up to 5GT/s.

AMD® A55 FCH chipset

AMD® A55 FCH is designed to support up to 5GT/s interface speed and 6 x SATA 3.0Gb/s ports.

Dual-Channel DDR3 1866 / 1600 / 1333 / 1066 MHz Support

This motherboard supports dual-channel DDR3 memory with data transfer rates of DDR3 1866 / 1600 / 1333 / 1066 MHz to boost the system's performance, and to meet the higher bandwidth requirements of 3D graphics, multimedia, and Internet applications.

100% All High-quality Conductive Polymer Capacitors

This motherboard uses all high-quality conductive polymer capacitors for durability, improved lifespan, and enhanced thermal capacity.

1.1.2 ASUS DIGI+ VRM

DIGI+POWER CONTROL: Digital Power Design for the APU\*

ASUS motherboards using the AMD® A55 chipset employ precise digital voltage regulation for the APU, called DIGI+ VRM (Voltage Regulation Modules) digital power design. The APU voltage is adjusted either through carefully developed automated modes, or by using user-defined profiles. The result is that DIGI+ VRM technology ensures better energy efficiency and precise power delivery. Boosted by world-renowned ASUS quality, DIGI+ VRM creates an ideal computing platform for a diverse range of applications, from gaming to multimedia or office work and heavy multitasking. Engineered and tested to assure unmitigated performance, ASUS A55 boards with DIGI+ VRM remain efficient and accurate for reliable performance in every scenario.

* DIGI+ VRM features are also available in FM2 socket compatible CPUs

1.1.3 ASUS Exclusive Features

ASUS Network iControl

With a single-click on/off button, the application currently in use has its data and network badndwidth prioritized over other programs. Moreover, you can prioritize your favorite software easily by configuring profiles through the intuitive user interface. Within the profile, programs can be prescheduled to run during a specific time period to avoid network congestion and long-waits for downloads. Auto PPPoE network connection provides a one-step setup for enhanced online convenience. Overall, it's an intuitive network bandwidth control center.

ASUS UEFI BIOS (EZ Mode)

ASUS UEFI BIOS, a UEFI compliant architecture, offers the first mouse-controlled intuitive graphical BIOS interface that goes beyond the traditional keyboard-only BIOS controls, providing you with more flexibility, convenience, and easy to navigate EFI BIOS than the traditional BIOS versions. It offers you with dual selectable modes and native support for hard drives larger than 2.2 TB.

ASUS UEFI BIOS includes the following new features:

• F12 BIOS snapshot hotkey
• F3 Shortcut for most accessed information
• ASUS DRAM SPD (Serial Presence Detect) information detecting faulty DIMMs, and helping with difficult POST situations.

EPU

EPU (Energy Processing Unit), the world's first real-time system power-saving chip, automatically detects the current system load and intelligently moderates power usage. It offers a total system-wide energy optimization, reduces fan noise, and extends the component's lifespan.

ASUS Anti-Surge Protection

This special design protects expensive devices and the motherboard from damage caused by power surges from switching power supply unit (PSU).

Al Suite II

With its user interface, ASUS AI Suite II integrates several ASUS utilities and allows you to launch and operate these utilities simultaneously. It allows you to configure the overclocking settings, adjust the frequencies and related voltages, remotely control the system via a mobile device, and other easy-to-use helpful utilities.

ASUS Fan Xpert

ASUS Fan Xpert intelligently allows you to adjust the CPU fan speed based on different ambient temperatures, resulting in a quiet and cool computing environment.

ASUS EZ Flash 2

ASUS EZ Flash 2 is a user-friendly utility that allows you to update the BIOS without using a bootable floppy disk or an OS-based utility.

ASUS MyLogo2™

Turn your favorite photos into 256-color boot logos to personalize your system.

ASUS CrashFree BIOS 3

ASUS CrashFree BIOS 3 allows you to restore a corrupted BIOS file from a USB storage device that contains the BIOS file.

USB 3.0 Boost (A55M-A/USB3 only)

With USB 3.0 Boost technology, a USB device's transmission speed is significantly increased, adding to an already impressive USB 3.0 transfer speed. ASUS software automatically accelerates data speeds for compatible USB 3.0 peripherals without the need for any user interaction.

1.2 Before you proceed

Take note of the following precautions before you install motherboard components or change any motherboard settings.

• Unplug the power cord from the wall socket before touching any component.
• Before handling components, use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, to avoid damaging them due to static electricity.
• Hold components by the edges to avoid touching the ICs on them.
• Whenever you uninstall any component, place it on a grounded antistatic pad or in the bag that came with the component.
• Before you install or remove any component, switch off the ATX power supply and detach its power cord. Failure to do so may cause severe damage to the motherboard, peripherals, or components.

Standby Power LED

The motherboard comes with a standby power LED that lights up to indicate that the system is ON, in sleep mode, or in soft-off mode. This is a reminder that you should shut down the system and unplug the power cable before removing or plugging in any motherboard component. The illustration below shows the location of the onboard LED.

SB_PWR ON Standby Power OFF Powered Off

A55M-A/USB3 Onboard LED

1.3 Motherboard overview

1.3.1 Placement direction

When installing the motherboard, ensure that you place it into the chassis in the correct orientation. The edge with external ports goes to the rear part of the chassis as indicated in the image below.

1.3.2 Screw holes

Place six screws into the holes indicated by circles to secure the motherboard to the chassis.

DO NOT overtighten the screws! Doing so can damage the motherboard.

Place this side towards the rear of the chassis. ASUS A55M-A/USB3

1.3.3 Motherboard layout

A55M-A Series motherboards include A55M-A and A55M-A/USB3 models. The package contents vary between models. The layout illustrations in this user guide are for A55M-A/USB3 only.

18.8cm(7.4in) KBMS HDMI DVI_VGA USB1112 LAN1_USB12 AUDIO KR_USBW6 ASM 1042 ASUS A55M-A/USB3 PCIEX16 PCIEX1_1 Super I/O PCI1 ALC 867 SB_PWR AAFP SPDIF_OUT USBPWF USB56 USB34 CPU_FAN CHA_FAN SOCKET FM2 DDR3 DIMM_A1 (64bit, 240-pin module) DDR3 DIMM_B1 (64bit, 240-pin module) EATXPWR SATA6G_5 SATA6G_6 SATA6G_3 SATA6G_4 SATA6G_1 SATA6G_2 32Mb BIOS CLRTC_SPEAKER F_PANEL 23.6cm(9.3in) 2 6 7

1.3.4 Layout contents

Connectors/Jumpers/Slots/LED Page

1. Keyboard power (3-pin KB_USBPWB) 1-21
2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)	1-24
3. AMD FM2 socket	1-7
4. CPU fan connector (4-pin CPU_FAN) and Chassis fan connector (3-pin CHA_FAN)	1-23
5. DDR3 DIMM slots	1-11
6. SATA 3.0Gb/s connectors (7-pin SATA3G_1~6)	1-25
7. System panel connector (10-1 pin F_PANEL)	1-26
8. Speaker connector (4-pin SPEAKER)	1-26
9. Clear RTC RAM (3-pin CLRTC)	1-20
10. USB 2.0 connectors (10-1 pin USB56, USB34)	1-28
11. USB device wake-up (3-pin USBPWF)	1-21
12. Digital audio connector (4-1 pin SPDIF_OUT)	1-27
13. Front panel audio connector (10-1 pin AAFP)	1-27
14. Standby power LED (SB_PWR)	1-4

1.4 Accelerated Processing Unit (APU)

This motherboard comes with an FM2 socket designed for AMD® A-series accelerated processors with AMD® Radeon™ HD 7000 series graphics.

Ensure that you use a APU designed for the FM2 socket. The APU fits in only one correct orientation. DO NOT force the APU into the socket to prevent bending the pins and damaging the APU!

A55M-A/USB3 AMD

A55M-A/USB3 CPU socket FM2

1.4.1 APU installation

1.4.2 APU heatsink and fan assembly installation

Line drawing of a pipette dispensing green liquid into a rectangular container (no text or symbols)

Apply the Thermal Interface Material to the APU heatsink and APU before you install the heatsink and fan if necessary.

To install the APU heatsink and fan assembly

1

Diagram of a computer cooling system showing fan cooling and cooling mechanism (no text or labels)

2

Technical line drawing of a computer CPU with cooling fan and heatsink (no text or symbols)

3

Technical line drawing of a computer cooling fan with heatsink and cooling bracket (no text or symbols)

4

Technical line drawing of a CPU cooler with cooling fan and heat exchanger (no text or symbols)

5

Isometric diagram of a CPU fan connector with multiple wires, no text or symbols present

To uninstall the APU heatsink and fan assembly

1.5 System memory

1.5.1 Overview

This motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Modules (DIMM) sockets.

A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are developed for better performance with less power consumption.

The figure illustrates the location of the DDR3 DIMM sockets:

ASIM-A2/USB3 DIMM_A1 DIMM_B1

Channel Sockets

Channel A DIMM_A1

Channel B DIMM_B1

A55M-A/USB3 240-pin DDR3 DIMM sockets

1.5.2 Memory configurations

You may install 1GB, 2GB, 4GB, and 8GB unbuffered non-ECC DDR3 DIMMs into the DIMM sockets.

• You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation.
• Always install DIMMs with the same CAS latency. For optimal compatibility, we recommend that you install memory modules of the same version or date code (D/C) from the same vendor. Check with the retailer to get the correct memory modules.
• Due to the memory address limitation on 32-bit Windows OS, when you install 4GB or more memory on the motherboard, the actual usable memory for the OS can be about 3GB or less. For effective use of memory, we recommend that you do any of the following:

- Install a maximum of 3GB system memory if you are using a 32-bit Windows OS.

- Use a 64-bit Windows OS if you want to install 4GB or more memory on the motherboard.

• This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less.
• The maximum 32GB memory capacity can be supported with 16GB or above DIMMs. ASUS will update the memory QVL once the DIMMs are available in the market.

• The default memory operation frequency is dependent on its Serial Presence Detect (SPD), which is the standard way of accessing information from a memory module. Under the default state, some memory modules for overclocking may operate at a lower frequency than the vendor-marked value. To operate at the vendor-marked or at a higher frequency, refer to section 2.4 Ai Tweaker menu for manual memory frequency adjustment.
• For system stability, use a more efficient memory cooling system to support a full memory load (2 DIMMs) or overclocking condition.

A55M-A Series Motherboard Qualified Vendors Lists (QVL)

DDR3 1866 MHz capability

Vendors Part No. Size SS/DS				Chip Brand	Chip NO. Timing Voltage			DIMM socket support (Optional)1 DIMM 2 DIMMs
CORSAIR	CMT6GX3MA1866C9(XMP)	6GB(3 x 2GB)	DS	-	-	9-9-9-24	1.65V	•	•
CORSAIR	CMZ8GX3M2A1866C9(XMP)	8GB(2 x 4GB)	DS	-	-	9-10-9-27	1.50V	•	•
G.SKILL	F3-14900CL9Q-16GBZL(XMP1.3)	16GB(4GB x 4)	DS	-	-	9-10-9-28	1.5V	•	•
G.SKILL	F3-14900CL10Q2-64GBZLD(XMP1.3)	64GB(8GB x 8)	DS	-	-	10-11-10-30	1.5V	•	•
KINGSTON	KHX1866C9D3K4/16GX(XMP)	16GB(4GB x 4)	DS	-	-	-	1.65V	•	•
KINGSTON	KHX1866C9D3T1K3/6GX(XMP)	6GB(3 x 2GB)	DS	-	-	-	1.65V	•	•
KINGSTON	KHX1866C11D3P1K2/8G	8GB(4GB x 2)	DS	-	-	-	1.5V	•	•
KINGSTON	KHX1866C9D3K2/8GX(XMP)	8GB(4GB x 2)	DS	-	-	-	1.65V	•	•

DDR3 1600 MHz capability

Vendors Part No. Size			SS/DS	Chip Brand	Chip No. Timing Voltage			DIMM socket support (optional)1DIMM 2DIMMs
A-DATA AM2U16BC2P1 2GB SS A-DATA					3CCD-1509AEL1126T	---
Apacer 78.B1GE3.9L10C 4GB DS				Apacer KZZC	AM5D5908DEQSCK - - -
CORSAIR CMD12GX3M6A1600C8(XMP)		12GB(6x2GB)	DS	-	-	8-8-8-24	1.65V	.
CORSAIR CMZ32GX3M4X1600C10(XMP)		32GB(8GBx4)	DS	-	-	10-10-10-27	1.50V	.
CORSAIR CMP4GX3M2A1600C8(XMP)		4GB(2 x 2GB)	DS	-	-	8-8-8-24	1.65V	.
CORSAIR CMP4GX3M2A1600C9(XMP)		4GB(2 x 2GB)	DS	-	-	9-9-9-24	1.65V	.
CORSAIR CMP4GX3M2C1600C7(XMP)		4GB(2 x 2GB)	DS	-	-	7-8-7-20	1.65V	.
CORSAIR CMX4GX3M2A1600C9(XMP)		4GB(2 x 2GB)	DS	-	-	9-9-9-24	1.65V	.
CORSAIR CMX4GX3M2A1600C9(XMP)		4GB(2 x 2GB)	DS	-	-	9-9-9-24	1.65V	.
CORSAIR TR3X6G1600C8 G(XMP)		6GB(3 x 2GB)	DS	-	-	8-8-8-24	1.65V	.
CORSAIR TR3X6G1600C8D G(XMP)		6GB(3 x 2GB)	DS	-	-	8-8-8-24	1.65V	.
CORSAIR TR3X6G1600C9 G(XMP)		6GB(3 x 2GB)	DS	-	-	9-9-9-24	1.65V	.
CORSAIR CMP8GX3M2A1600C9(XMP)		8GB(2 x 4GB)	DS	-	-	9-9-9-24	1.65V	.
CORSAIR CMZ8GX3M2A1600C7R(XMP)		8GB(2 x 4GB)	DS	-	-	7-8-7-20	1.50V	.
CORSAIR CMX8GX3M4A1600C9(XMP)		8GB(4 x 2GB)	DS	-	-	9-9-9-24	1.65V	.
Crucial BL25664BN1608.16FF(XMP)		6GB(3 x 2GB)	DS	-	-	---
G.SKILL	F3-12800CL7D-4GBECO(XMP)	4GB(2 x 2GB)	DS	-	-	7-7-8-24	XMP1.35V	.
G.SKILL	F3-12800CL9D-4GBECO(XMP)	4GB(2 x 2GB)	DS	-	-	9-9-9-24	XMP1.35V	.
G.SKILL	F3-12800CL9D-4GBRL(XMP)	4GB(2 x 2GB)	DS	-	-	9-9-9-24	1.5V	.
G.SKILL	F3-12800CL8D-8GBECO(XMP)	8GB(2 x 4GB)	DS	-	-	8-8-8-24	XMP1.35V	.
G.SKILL	F3-12800CL9D-8GBRL(XMP)	8GB(2 x 4GB)	DS	-	-	9-9-9-24	1.5V	.
HYNIX	HMT351U6CFR8C-PB	4GB DS	HYNIX		HSTQ2G83CFRPBC	---
KINGMAX	FLGE85F-B8KJ9A FEIS(XMP)	2GB	DS	-	-	-	1.5V	.
KINGSTON	KHX1600C9D3P1K2/4G	4GB(2 x 2GB)	SS -		-	-1.5V	..
KINGSTON	KHX1600C9D3K3/12GX(XMP)	12GB(3x4GB)	DS	-	-	9-9-9-27	1.65V	.
KINGSTON	KHX1600C9D3T1BK3/12GX(XMP)	12GB(3x4GB)	DS	-	-	9-9-9-27	1.65V	.
KINGSTON	KHX1600C9D3K4/16GX(XMP)	16GB(4GBx4)	DS	-	-	-	1.65V	.
KINGSTON	KHX1600C10D3B1K2/16G	16GB(8GBx2)	DS	-	-	-	1.5V	.
KINGSTON	KHX16C9K2/16	16GB(8GBx2)	DS	-	-	-	1.5V	.
KINGSTON	KHX1600C9AD3/2G	2GB	DS	-	-	-	1.65V	.
KINGSTON	KVR1600D3N11/2G-ES	2GB	DS	KTC	D1288JPNDPLD9U	11-11-11-28	1.35V-1.5V	.

DDR3 1600 MHz capability

Vendors Part No. Size			SS/DS	Chip Brand	Chip No. Timing Voltage			DIMM socket support (optional)1DIMM 2DIMMs
KINGSTON KHX1600C7D3K2/4GX(XMP)		4GB(2x2GB)	DS --- 1.65V ..
KINGSTON KHX1600C8D3K2/4GX(XMP)		4GB(2x2GB)	DS --- 8 1.65V ..
KINGSTON	KHX1600C8D3T1K2/4GX(XMP)	4GB(2x2GB)	DS --- 8 1.65V ..
KINGSTON KHX1600C9D3K2/4GX(XMP)		4GB(2x2GB)	DS --- 9 1.65V ..
KINGSTON	KHX1600C9D3LK2/4GX(XMP)	4GB(2x2GB)	DS --- 9				XMP1.35V	.
KINGSTON	KHX1600C9D3X2K2/4GX(XMP)	4GB(2x2GB)	DS --- 9-9-9-27 1.65V ..
KINGSTON	KHX1600C9D3T1K3/6GX(XMP)	6GB(3x2GB)	DS --- 1.65V ..
KINGSTON KHX1600C9D3K3/6GX(XMP)		6GB(3x2GB)	DS --- 9 1.65V ..
KINGSTON	KHX1600C9D3T1BK3/6GX(XMP)	6GB(3x2GB)	DS --- 9-9-9-27 1.65V ..
KINGSTON KHX1600C9D3K2/8GX(XMP)		8GB(2x4GB)	DS --- 9-9-9-27 1.65V ..
KINGSTON KHX1600C9D3P1K2/8G		8GB(2x4GB)	DS --- 1.5V ..
SanMax	SMD-4G68HP-16KZ	4GB	DS	HYNIX	H5TQ2G83BFR PBC	-	-	.
AMD	AE32G1609U1-U	2GB	SS	-	23EY4587MB6H11503M	9-9-9-24	1.5V	.
AMD	AE34G1609U2-U	4GB	DS	AMD	23EY4587MB6H11503M	9-9-9-24	1.5V	.
ASint	SLZ302G08-EGN1C	2GB	SS	Asint	SLZ302G08-GN1C	-	-	.
ASint	SLA302G08-EGN1C	4GB	DS	Asint	SLA302G08-GN1C	-	-	.
ASint	SLB304G08-EGN1B	8GB	DS	Asint	SLB304G08-GN1B	-	-	.
Elixir	M2P2G64CB8HC9N-DG(XMP)	2GB DS	---- .
PATRIOT	PGD316G1600ELK(XMP)	32GB(8GBx4)	DS --- 9-9-9-24 1.65V ..
Silicon Power	SP004GBLTU160V02(XMP)	4GB	DS	S-POWER	20YT5NG-1201	-	-	.

DDR3 1333 MHz capability

Vendors	Part No. Size		SS/DS	Chip Brand	Chip No.	Timing	Voltage	DIMM socket support (optional)
								1DIMM	2DIMMs
A-DATA	AD3U1333C2G9	2GB	SS	A-DATA	3CCD-1509HNA1126L	-	1.5V	.	.
A-DATA	AM2U139C2P1	2GB	SS	ADATA	3CCD-1509A EL1127T	-	-	.	.
A-DATA	AX3U1333C2G9-BP	2GB	SS	-	-	-	-	.	.
A-DATA	AXDU1333GC2G9-2G (XMP)	4GB(2x2GB)	SS	-	-	9-9-9-24	1.25V-1.35V(low voltage)	.	.
A-DATA	AM2U139C4P2	4GB	DS	ADATA	3CCD-1509A EL1127T	-	-	.	.
A-DATA	SU3U1333W8G9-B	8GB	DS	ELPIDA	J4208BASE-DJ-F	-	-	.	.
Apacer	78.A1GC6.9L1	2GB	DS	Apacer	AM5D5808DEWSBG	-	-	.	.
Apacer	78.A1GC6.9L1	2GB	DS	Apacer	AM5D5808FEQSBG	9	-	.	.
Apacer	AU02GFA33C9NBGC	2GB	DS	Apacer	AM5D5808APQSBG	-	-	.	.
Apacer	78.B1GDE.9L10C	4GB	DS	Apacer	AM5D5908CEHSBG	-	-	.	.
CORSAIR	TR3X6G1333C9 G	6GB(3x2GB)	SS	-	-	9-9-9-24	1.50V	.	.
CORSAIR	TW3X4G1333C9D G	4GB(2x2GB)	DS	-	-	9-9-9-24	1.50V	.	.
CORSAIR	CM3X4GA1333C9N2	4GB	DS	CORSAIR	256MBDCJGELC0401136	9-9-9-24	-	.	.
CORSAIR	CMX4GX3M1A1333C9	4GB	DS	-	-	9-9-9-24	1.50V	.	.
Crucial	CT25664BA1339.16FF	2GB	DS	Micron	9KF27D9KPT	9	-	.	.
Crucial	BL25664BN1337.16FF (XMP)	6GB(3x2GB)	DS	-	-	7-7-7-24	1.65V	.	.
ELPIDA	EBJ21UE8EDF0-DJ-F	2GB	DS	ELPIDA	J1108EDSE-DJ-F	-	1.35V(low voltage)	.	.
G.SKILL	F3-10666CL8D-4GBECO(XMP)	4GB(2x2GB)	DS	-	-	8-8-8-8-24	XMP 1.35V	.	.
G.SKILL	F3-10666CL7D-8GBRH(XMP)	8GB(2x4GB)	DS	-	-	7-7-7-21	1.5V	.	.

DDR3 1333 MHz capability

Vendors Part No. Size			SS/DS	Chip Brand Chip No. Timing Voltage				DIMM socket support(optional)1DIMM 2DIMMs
GEIL GV34GB1333C9DC		4GB(2x2GB)	DS--9-9-9-24 1.5V..
GEIL GVP34GB1333C7DC		4GB(2x2GB)	DS--7-7-7-24 1.5V..
Hynix HMT125U6TFR8A-H9 2GB DS Hynix H5TC1G83TFRH9A							1.35V(low voltage)	.
Hynix	HMT351U6BFR8C-H9	4GB	DS	Hynix	H5TQ2G83BFRH9C	-	-	.
KINGMAX	FLFE85F-C8KF9 CAES	2GB	SS	KINGMAX	KFC8FMFXF-DXX-15A	-	-	.
KINGMAX	FLFE85F-C8KL9 NAES	2GB	SS	KINGMAX	KFC8FNLXF-DXX-15A	-	-	.
KINGMAX	FLFE85F-C8KM9 NAES	2GB	SS	KINGMAX	KFC8FNMXF-BXX-15A	-	-	.
KINGMAX	FLFE85F-B8KL9 NEES	2GB	DS	KINGMAX	KKB8FNWBFGNX-26A	-	-	.
KINGMAX	FLFF65F-C8KL9 NEES	4GB	DS	KINGMAX	KFC8FNLXF-DXX-15A	-	-	.
KINGMAX	FLFF65F-C8KM9 NEES	4GB	DS	KINGMAX	KFC8FNMXF-BXX-15A	-	-	.
KINGSTON	KVR1333D3S8N9/2G	2GB	SS	Micron	IID77 D9LGK	-	1.5V	.
KINGSTON	KVR1333D3S8N9/2G-SP	2GB	SS	ELPIDA	J2108BCSE-DJ-F	-	1.5V	.
KINGSTON	KVR1333D3N9/2G	2GB	DS	ELPIDA	J1108BFBG-DJ-F	9	1.5V	.
KINGSTON	KVR1333D3N9/2G	2GB	DS	KTC	D1288JPNDPLD9U	9	1.5V	.
KINGSTON	KVR1333D3N9/2G	2GB	DS	ELPIDA	J1108BDSE-DJ-F	9	1.5V	.
KINGSTON	KVR1333D3N9/2G-SP	2GB	DS	KTC	D1288JEMFNGD9U	-	1.5V	.
KINGSTON	KVR1333D3N9/2G-SP	2GB	DS	KINGSTON	D1288JPSFPGD9U	-	1.5V	.
KINGSTON	KHX1333C7D3K2/4GX(XMP)	4GB(2x2GB)	DS--7		1.65V..
KINGSTON	KVR1333D3N9/4G	4GB	DS	ELPIDA	J2108BCSE-DJ-F	9	1.5V	.
KINGSTON	KVR1333D3N9/4G	4GB	DS	ELPIDA	J2108BCSE-DJ-F	-	1.5V	.
KINGSTON	KVR1333D3N9/4G	4GB	DS	KTC	D2568JENCNGD9U	-	1.5V	.
KINGSTON	KVR1333D3N9/4G	4GB	DS	Hynix	H5TQ2G83AFR	-	-	.
KINGSTON	KVR1333D3N9/4G-SP	4GB	DS	KINGSTON	D2568JENCPGD9U	-	1.5V	.
Micron	MT8JTF25664AZ-1G4D1	2GB	SS	Micron	OJD12D9LGK	-	-	.
Micron	MT8JTF25664AZ-1G4M1	2GB	SS	MICRON	IJM22 D9PFJ	-	-	.
Micron	MT16JTF25664AZ-1G4F1	2GB	DS	Micron	9KF27D9KPT	9	-	.
Micron	MT16JTF51264AZ-1G4D1	4GB	DS	Micron	OLD22D9LGK	-	-	.
NANYA	NT4GC64B8HG0NF-CG	4GB	DS	NANYA	NT5CB256M8GN-CG	-	-	.
PSC	AL8F8G73F-DJ2	2GB	DS	PSC	A3P1GF3FGF	-	-	.
SAMSUNG	M378B5773DH0-CH9	2GB	SS	SAMSUNG	K4B2G0846D	-	-	.
SAMSUNG	M378B5673FH0-CH9	2GB	DS	SAMSUNG	K4B1G0846F	-	-	.
SAMSUNG	M378B5273CH0-CH9	4GB	DS	SAMSUNG	K4B2G0846C	-	-	.
Super Talent	W1333UB2GS	2GB	DS	SAMSUNG	K4B1G0846F	9	-	.
Super Talent	W1333UB4GS	4GB	DS	SAMSUNG	K4B2G0846C	-	-	.
Super Talent	W1333UX6GM	6GB(3x2GB)	DS Micron		0BF27D9KPT	9-9-9-24	1.5V..
KINGSTEK	KSTD3PC-10600	2GB	SS	MICRON	PE911-125E	-	-	.
AMD	AE32G1339U1-U	2GB	SS	AMD	23EY4587MB3H11503M	9-9-9-24	1.5V	.
AMD	AE34G1339U2-U	4GB	DS	AMD	23EY4587MB3H11503M	9-9-9-24	1.5V	.
ASint	SLZ302G08-EDJ1C	2GB	SS	Asint	SLZ302G08-DJ1C	-	-	.
ASint	SLA302G08-EDJ1C	4GB	DS	Asint	SLA302G08-DJ1C	-	-	.
ASint	SLB304G08-EDJ1B	8GB	DS	Asint	SLB304G08-DJ1B	-	-	.
Elixir	M2F2G64CB88B7N-CG	2GB	SS	Elixir	N2CB2G80BN-CG	-	-	.
Elixir	M2F2G64CB88D7N-CG	2GB	SS	Elixir	N2CB2G80DN-CG	-	-	.
Elixir	M2F2G64CB88G7N-CG	2GB	SS	Elixir	N2CB2G80GN-CG	-	-	.
Elixir	M2F4G64CB8HB5N-CG	4GB	DS	Elixir	N2CB2G80BN-CG	-	-	.
Elixir	M2F4G64CB8HD5N-CG	4GB	DS	Elixir	N2CB2G80DN-CG	-	-	.

DDR3 1333 MHz capability

Vendors	Part No.	Size	SS/DS	Chip Brand	Chip No.	Timing	Voltage	DIMM socket support(optional)
								1DIMM	2DIMMs
KINGSHARE	KSRPCD313332G	2GB	DS	PATRIOT	PM128M8D385-15	-	-	.
Kingtiger	2GB DIMM PC3-10666	2GB	DS	SAMSUNG	SEC 904 HCH9 K4B1G0846D	-	-	.	.
Kingtiger	KTG2G1333PG3	2GB	DS	-	-	-	-		.
MARKVISION	BMD32048M1333C9-1123	2GB	DS	MARKVISION	M3D1288P-13	-	-	.	.
MARKVISION	BMD34096M1333C9-1124	4GB	DS	MARKVISION	M3D2568E-13	-	-	.	.
PATRIOT	PSD32G13332H	2GB	DS	-	-	-	-	.	.
PATRIOT	PG38G1333EL(XMP)	8GB	DS	-	-	9-9-9-24	1.5V	.	.
RAMAXEL	RMR1870ED48E8F-1333	2GB	DS	ELPIDA	J1108BDBG-DJ-F	-	-	.	.
RAMAXEL	RMR1870EC58E9F-1333	4GB	DS	ELPIDA	J2108BCSE-DJ-F	-	-	.	.
RiDATA	C304627CB1AG22Fe	2GB	DS	RiDATA	N/A	9	-	.	.
RiDATA	E304459CB1AG32Cf	4GB	DS	RiDATA	N/A	9	-	.	.
Silicon Power	SP002GBLTU133V02	2GB	SS	S-POWER	20YT3NG-1202	-	-	.	.
Silicon Power	SP002GBLTU133S02	2GB	DS	Elixir	N2CB1680AN-C6		-	.	.
Silicon Power	SP004GBLTU133V02	4GB	DS	S-POWER	20YT3NG-1201	-	-	.	.
TAKEMS	TMS2GB364D081-107EY	2GB	DS	-	-	7-7-7-20	1.5V	.	.
TAKEMS	TMS2GB364D081-138EY	2GB	DS	-	-	8-8-8-24	1.5V
TAKEMS	TMS2GB364D082-138EW	2GB	DS	-	-	8-8-8-24	1.5V	.	.
UMAX	E41302GP0-73BDB	2GB	DS	UMAX	U2S24D30TP-13	-	-	.	.
WINTEC	3WVS31333-2G-CNR	2GB	DS	AMPO	AM3420803-13H	-	-	.	.

DDR3 1066 MHz capability

Vendors Part No. Size SS/DS Chip Brand Chip NO. Timing Voltage								DIMM socket support(Optional)1 DIMM 2 DIMMs
Crucial CT12864BA1067.8FF 1GB SS Micron 9GF22D9KPT 7 -				•	•
ELPIDA	EBJ21UE8EDF0-AE-F	2GB DS ELPIDA J1108EDSE-DJ-F -					1.35V(low voltage)	•
KINGSTON	KVR1066D3N7/1G(low profile)	1GB	SS	ELPIDA	J1108BFSE-DJ-F	7	1.5V	•
KINGSTON	KVR1066D3N7/4G	4GB	DS	Hynix	H5TQ2G83AFR	7	1.5V	•

Side(s): SS - Single-sided DS - Double-sided

DIMM support:

• 1 DIMM: Supports one module inserted into any slot as Single-channel memory configuration.
• 2 DIMMs: Supports two modules inserted into both the blue slots as one pair of Dual-channel memory configuration.

Visit the ASUS website at www.asus.com for the latest QVL.

1.5.3 Installing a DIMM

To remove a DIMM

A B

1.6 Expansion slots

In the future, you may need to install expansion cards. The following sub-sections describe the slots and the expansion cards that they support.

Unplug the power cord before adding or removing expansion cards. Failure to do so may cause you physical injury and damage motherboard components.

1.6.1 Installing an expansion card

To install an expansion card:

1. Before installing the expansion card, read the documentation that came with it and make the necessary hardware settings for the card.
2. Remove the system unit cover (if your motherboard is already installed in a chassis).
3. Remove the bracket opposite the slot that you intend to use. Keep the screw for later use.
4. Align the card connector with the slot and press firmly until the card is completely seated on the slot.
5. Secure the card to the chassis with the screw you removed earlier.
6. Replace the system cover.

1.6.2 Configuring an expansion card

After installing the expansion card, configure it by adjusting the software settings.

1. Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for information on BIOS setup.
2. Assign an IRQ to the card.
3. Install the software drivers for the expansion card.

When using PCI cards on shared slots, ensure that the drivers support "Share IRQ" or that the cards do not need IRQ assignments. Otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable.

1.6.3 PCI slot

The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that comply with PCI specifications.

1.6.4 PCI Express x1 slot

This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that comply with the PCI Express specifications.

1.6.5 PCI Express x16 slot

This motherboard supports one PCI Express x16 graphics card that complies with the PCI Express specifications.

IRQ assignments for this motherboard

A B C D E F G H
PCIEx16_1 -- shared ----
PCIEx1_1 shared ----
PCI1 slot ---- shared ---
Realtek LAN controller - shared ----
HD audio shared ----
SATA controller	---- shared ----
On Chip USB EHCI 1/2/3	- shared ----
On Chip USB EHCI 1/2/3/4	shared
ASM1042 USB3.0 controller	-- shared ----

1.7 Jumpers

1. Clear RTC RAM (CLRTC)

This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords.

A55M-A/USB3 Clear RTC RAM CLRTC 1 2 Normal (Default) 2 3 Clear RTC

To erase the RTC RAM:

1. Turn OFF the computer and unplug the power cord.
2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3 for about 5\~10 seconds, then move the cap back to pins 1-2.
3. Plug the power cord and turn ON the computer.
4. Hold down the key during the boot process and enter BIOS setup to reenter data.

Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure!

• If the steps above do not help, remove the onboard battery and move the jumper again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery.
• You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the CPU Parameter Recall (C.P.R) feature. Shut down and reboot the system so the BIOS can automatically reset parameter settings to default values.

2. USB device wake-up (3-pin USBPFW)

Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped, DRAM refreshed, system running in low power mode) using the connected USB devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU, DRAM in slow refresh, power supply in reduced power mode).

USBPWF 1 2 +5V (Default) 2 3 +5VSB

A55M-A/USB3 USB device wake up

- The USB device wake-up feature requires a power supply that can provide 500mA on the +5VSB lead for each USB port; otherwise, the system would not power up.

- The total current consumed must NOT exceed the power supply capability (+5VSB) whether under normal condition or in sleep mode.

2. Keyboard power (3-pin KB\_USBPWB)

This jumper allows you to enable or disable the keyboard wake-up feature. When you set this jumper to pins 2-3 (+5VSB), you can wake up the computer by pressing a key on the keyboard. This feature requires an ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding setting in the BIOS.

KB_USBPWB 1 2 +5V 2 3 +5VSB (Default)

A55M-A/USB3 Keyboard and USB device wake up

1.8 Connectors

1.8.1 Rear panel ports

1 2 3 45 11 10 9 8 7 6

1. PS/2 Mouse port (green). This port is for a PS/2 mouse.

2. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other VGA-compatible devices.

3. LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN) through a network hub.

LAN port LED indications

Activity/Link LED	Speed LED
Status Description Status Description
OFF No link OFF 10Mbps connection
ORANGE Linked ORANGE 100Mbps connection
BLINKING Data activity GREEN 1Gbps connection

ACT/LINK SPEED LED

LAN port

1. Line In port (light blue). This port connects to the tape, CD, DVD player, or other audio sources.

2. Line Out port (lime). This port connects to a headphone or a speaker. In the 4, 6, and 8-channel configurations, the function of this port becomes Front Speaker Out.

3. Microphone port (pink). This port connects to a microphone.

Refer to the audio configuration table below for the function of the audio ports in 2, 4, 6, or 8-channel configuration.

Audio 2, 4, 6, or 8-channel configuration

Port	Headset2-channel	4-channel 6-channel	8-channel
Light Blue (Rear panel)	Line In	Rear Speaker Out	Rear Speaker Out	Rear Speaker Out
Lime (Rear panel)	Line Out	Front Speaker Out	Front Speaker Out	Front Speaker Out
Pink (Rear panel)	Mic In	Mic In	Bass/Center	Bass/Center
Lime (Front panel)	—	—	—	Side Speaker Out

To configure an 8-channel audio output:

Use a chassis with HD audio module in the front panel to support an 8-channel audio output.

1. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are for USB 2.0/1.1 devices.
2. USB 3.0 ports 11 and 12 (A55M-A/USB3 only). These two 4-pin Universal Serial Bus (USB) ports are for connecting USB 3.0 devices.
   USB 2.0 ports 11 and 12 (A55M-A only). These two 4-pin Universal Serial Bus (USB) ports are for USB 2.0/1.1 devices.
3. DVI-D port. This port is for any DVI-D compatible device. DVI-D can't be converted to output RGB signal to CRT and isn't compatible with DVI-I
4. HDMI port. This port is for a High-Definition Multimedia Interface (HDMI) connector, and is HDCP compliant allowing playback of HD DVD, Blu-ray, and other protected content.
5. PS/2 Keyboard port (purple). This port is for a PS/2 keyboard.

1.8.2 Internal connectors

1. CPU and chassis fan connectors (4-pin CPU_FAN, and 3-pin CHA_FAN)

Connect the fan cables to the fan connectors on the motherboard, ensuring that the black wire of each cable matches the ground pin of the connector.

CPU_FAN CHA_FAN CPU FAN PWM CPU FAN IN CPU FAN PWR GND Rotation +12V GND ASILE A55K-A/USB3

A55M-A/USB3 CPU fan connector

DO NOT forget to connect the fan cables to the fan connectors. Insufficient air flow inside the system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps on the fan connectors.

• The CPU_FAN connector supports a CPU fan of maximum 2A (24 W) fan power.
• Only the CPU_FAN connector support the ASUS Fan Xpert feature.

2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)

These connectors are for an ATX power supply. The plugs from the power supply are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.

ATX12V EATXPWR +3 Volts GND +12 Volts +5 Volts +12 Volts +5 Volts +5V Standby +5 Volts Power OK -5 Volts GND GND +5 Volts GND GND GND +5 Volts PSON# GND GND +3 Volts -12 Volts +3 Volts +3 Volts PIN 1 PIN 1

A55M-A/USB3 ATX power connectors

• We recommend that you use an ATX 12V Specification 2.0-compliant power supply unit (PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin power plugs.
- If you intend to use a PSU with 20-pin and 4-pin power plugs, ensure that the 20-pin power plug can provide at least 15 A on +12 V and that the PSU has a minimum power rating of 300W. The system may become unstable or may not boot up if the power is inadequate.
• DO NOT forget to connect the 4-pin ATX +12V power plug. Otherwise, the system will not boot up.
- We recommend that you use a PSU with higher power output when configuring a system with more power-consuming devices or when you intend to install additional devices. The system may become unstable or may not boot up if the power is inadequate.
- If you are uncertain about the minimum power supply requirement for your system, refer to the Recommended Power Supply Wattage Calculator at http://support.asus.com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.

3. Serial ATA 3.0 Gb/s connectors (7-pin SATA3G 1\~6)

These connectors are for the Serial ATA 3.0 Gb/s signal cables for Serial ATA hard disk drives and optical disc drives. If you installed Serial ATA hard disk drives, you can create a RAID 0, RAID 1, or RAID 10 configuration through the onboard controller.

SATA3G_5 SATA3G_6 SATA3G_3 SATA3G_4 SATA3G_1 SATA3G_2 A55M-A/USB3 GND RSATA_TXP5 GND RSATA_TXN5 GND RSATA_RXP5 RSATA_RXP6 GND RSATA_TXN6 GND RSATA_RXN6 RSATA_RXP6 GND RSATA_TXP3 GND RSATA_TXN3 GND RSATA_TXP3 GND RSATA_RXP3 GND RSATA_RXP4 GND RSATA_TXP4 GND RSATA_RXP4 GND RSATA_TXP1 GND RSATA_TXP1 GND RSATA_RXP1 GND RSATA_RXP2 GND RSATA_TXP2 GND

A55M-A/USB3 SATA 3.0Gb/s connectors

• These connectors are set to AHCI mode by default. If you intend to create a Serial ATA RAID set using these connectors, set the type of the SATA connectors in the BIOS to [RAID]. See section 2.5.2 SATA Configuration for details.
• You must install Windows ^® XP Service Pack 3 or later version before using Serial ATA hard disk drives. The Serial ATA RAID feature is available only if you are using Windows ^® XP SP3 or later version.
• When using hot-plug and NCQ, set the type of the SATA connectors in the BIOS to [AHCI]. See section 2.5.2 SATA Configuration for details.

4. System panel connector (10-1 pin F\_PANEL)

This connector supports several chassis-mounted functions.

F_PANEL PWR LED PWR BTN PLED+ PLED- PWR GND PIN 1 HD_LED+ HD_LED- Ground HWRST# (NC) +HD_LED RESET

A55M-A/USB3 System panel connector

- System power LED (2-pin PLED)

This 2-pin connector is for the system power LED. Connect the chassis power LED cable to this connector. The system power LED lights up when you turn on the system power, and blinks when the system is in sleep mode.

• Hard disk drive activity LED (2-pin +IDELED)

This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable to this connector. The IDE LED lights up or flashes when data is read from or written to the HDD.

• ATX power button/soft-off button (2-pin PWRBTN)

This 2-pin connector is for the system power button.

• Reset button (2-pin RESET)

This 2-pin connector is for the chassis-mounted reset button for system reboot without turning off the system power.

5. Speaker connector (4-pin SPEAKER)

The 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings.

SPEAKER +5V GND GND Speaker Out PIN1

A55M-A/USB3 Speaker Out Connector

6. Digital audio connector (4-1 pin SPDIF\_OUT)

This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.

ASIM-AA1583 +5V SPDIFOUT GND SPDIF_OUT

A55M-A/USB3 Digital audio connector

The S/PDIF module is purchased separately.

7. Front panel audio connector (10-1 pin AAFP)

This connector is for a chassis-mounted front panel audio I/O module that supports either High Definition Audio or AC'97 audio standard. Connect one end of the front panel audio I/O module cable to this connector.

AAFP PIN 1 AGND NC PORT1 L PORT1 R SENSE1_RETUR PORT2 R SENSE2_RETUR SENSE_SEND PORT2 L HD-audio-compliant pin definition Legacy AC'97 compliant definition PIN 1 AGND NC MIC2 MICPWR Line out_R NC Line out_L

A55M-A/USB3 Front panel audio connector

- We recommend that you connect a high-definition front panel audio module to this connector to avail of the motherboard high-definition audio capability.

- If you want to connect a high definition front panel audio module to this connector, set the Front Panel Type item in the BIOS to [HD]. See section 2.5.5 Onboard Devices Configuration for details.

- The front panel audio I/O module is purchased separately.

8. USB 2.0 connectors (10-1 pin USB56, USB34)

These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connectors, then install the module to a slot opening at the back of the system chassis. These USB connectors comply with USB 2.0 specification that supports up to 480Mbps connection speed.

USB56 USB34 PIN 1 USB+5V USB_P5- USB_P5+ GND NC PIN 1 USB+5V USB_P3- USB_P3+ GND NC

A55M-A/USB3 USB2.0 connectors

Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard!

The USB 2.0 module is purchased separately.

1.9 Software support

1.9.1 Installing an operating system

This motherboard supports Windows® XP / Vista / Windows® 7 / Windows® 8 Operating Systems (OS). Always install the latest OS version and corresponding updates to maximize the features of your hardware.

- Motherboard settings and hardware options vary. Refer to your OS documentation for detailed information.

- Ensure that you install Windows ^ XP Service Pack 3 or later versions / Windows ^ Vista Service Pack 1 or later versions before installing the drivers for better compatibility and system stability.

- BIOS and drivers updates are required to support Windows ^® 8.

1.9.2 Support DVD information

The Support DVD that comes with the motherboard package contains the drivers, software applications, and utilities that you can install to avail all motherboard features.

The contents of the Support DVD are subject to change at any time without notice. Visit the ASUS website at www.asus.com for updates.

To run the Support DVD

Place the Support DVD into the optical drive. If Autorun is enabled in your computer, the DVD automatically displays the Specials screen. Click Drivers, Utilities, Make Disk, Manual, and Contact tabs to display their respective menus.

The following screen is for reference only.

ASUS AERM AVU 3.0 motherboard support CD Drivers Mouse Click Manual Contact Special ASUS InstAll Google Toolbar AMD Chipset Driver AMD Cool'n'Quiet Driver Norton Internet Security Solution APRP Utility Realtek Audio Driver Asmedia USB 3.0 Driver Realtek LAN Driver MB Please select items to install. Click an icon to display Support DVD/motherboard information

Click an item to install

If Autorun is NOT enabled on your computer, browse the contents of the Support DVD to locate the file ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run the DVD.

BIOS information

2.1 Managing and updating your BIOS

Save a copy of the original motherboard BIOS file to a USB flash disk in case you need to restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update utility.

2.1.1 ASUS Update utility

The ASUS Update is a utility that allows you to manage, save, and update the motherboard BIOS in Windows ^® environment.

• ASUS Update requires an Internet connection either through a network or an Internet Service Provider (ISP).
• This utility is available in the support DVD that comes with the motherboard package.

Installing ASUS Update

To install ASUS Update:

1. Place the support DVD in the optical drive. The Specials menu appears.
2. Click the Utilities tab, then click Al Suite II.
3. Follow the onscreen instructions to complete the installation.

Quit all Windows® applications before you update the BIOS using this utility.

Updating the BIOS

To update the BIOS:

1. From the Windows ^ desktop, click Start > Programs > ASUS > AI Suite II > AI Suite II X.XX.XX to launch the AI Suite II utility. The AI Suite II Quick Bar appears.
2. Click Update button from the Quick Bar, and then click ASUS Update from the popup menu. The ASUS Update main screen appears. From the list, select either of the following methods:

Updating from the Internet

a. Select Update BIOS from the Internet, then click Next.

b. Select the ASUS FTP site nearest you to avoid network traffic, then click Next.

c. From the FTP site, select the BIOS version that you wish to download then click Next.

The ASUS Update utility is capable of updating itself through the Internet. Always update the utility to avail all its features.

Updating from a BIOS file

a. Select Update BIOS from file, then click Next.

b. Locate the BIOS file from the Open window, then click Open.

1. Follow the onscreen instructions to complete the updating process.

2.1.2 ASUS EZ Flash 2

The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS-based utility.

Before you start using this utility, download the latest BIOS file from the ASUS website at www.asus.com.

To update the BIOS using EZ Flash 2:

1. Insert the USB flash disk that contains the latest BIOS file to the USB port.
2. Enter the Advanced Mode of the BIOS setup program. Go to the Tool menu to select ASUS EZ Flash 2 Utility and press to enable it.
3. Press to switch to the Drive field.
4. Press the Up/Down arrow keys to find the USB flash disk that contains the latest BIOS, and then press .
5. Press to switch to the Folder Info field.
6. Press the Up/Down arrow keys to find the BIOS file, and then press to perform the BIOS update process. Reboot the system when the update process is done.

• This function supports USB flash disks formatted using FAT 32/16 on a single partition.
• DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure!

2.1.3 ASUS CrashFree BIOS 3 utility

The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS file using the motherboard support DVD or a USB flash drive that contains the updated BIOS file.

- Before using this utility, rename the BIOS file in the removable device into A55MA.CAP (for A55M-A) or A55MAUSB3.CAP (for A55M-A USB3).

- The BIOS file in the support DVD may not be the latest version. Download the latest BIOS file from the ASUS website at www.asus.com.

Recovering the BIOS

To recover the BIOS:

1. Turn on the system.
2. Insert the support DVD to the optical drive or the USB flash drive that contains the BIOS file to the USB port.
3. The utility automatically checks the devices for the BIOS file. When found, the utility reads the BIOS file and enters ASUS EZ Flash 2 utility automatically.
4. The system requires you to enter BIOS Setup to recover BIOS setting. To ensure system compatibility and stability, we recommend that you press to load default BIOS values.

DO NOT shut down or reset the system while updating the BIOS! Doing so can cause system boot failure!

2.1.4 ASUS BIOS Updater

The ASUS BIOS Updater allows you to update BIOS in DOS environment. This utility also allows you to copy the current BIOS file that you can use as a backup when the BIOS fails or gets corrupted during the updating process.

The succeeding utility screens are for reference only. The actual utility screen displays may not be same as shown.

Before updating BIOS

1. Prepare the motherboard support DVD and a USB flash drive formatted using FAT32/16 on a single partition.
2. Download the latest BIOS file and BIOS Updater from the ASUS website at http://support.asus.com and save them on the USB flash drive.

NTFS is not supported under DOS environment. Do not save the BIOS file and BIOS Updater to a hard disk drive or USB flash drive in NTFS format.

1. Turn off the computer and disconnect all SATA hard disk drives (optional).

Booting the system in DOS environment

1. Insert the USB flash drive with the latest BIOS file and BIOS Updater to the USB port.
2. Boot your computer. When the ASUS Logo appears, press to show the BIOS Boot Device Select Menu. Insert the support DVD into the optical drive and select the optical drive as the boot device.

Please select boot device: SATA:XXXXXXXXXXXXXX USBXXXXXXXXXXXXXX UEFI:XXXXXXXXXXXXXX Enter Setup ↑ and ↓ to move selection ENTER to select boot device ESC to boot using defaults

1. When the Make Disk menu appears, select the FreeDOS command prompt item by pressing the item number.

2. At the FreeDOS prompt, type d: and press to switch the disk from Drive C (optical drive) to Drive D (USB flash drive).

Welcome to FreeDOS (http://www.freedos.org)!
C:\>d:
D:\> 

Updating the BIOS file

To update the BIOS file using BIOS Updater

1. At the FreeDOS prompt, type bupdater /pc /g and press .

D:\>bupdater /pc /g 

1. The BIOS Updater screen appears as below.

ASUSTek BIOS Updater for DOS V1.30 Current ROM BOARD: A55M-A/USB3 VER: 0202 DATE: 01/13/2013 Update ROM BOARD: Unknown VER: Unknown DATE: Unknown PATH: A:\ A: A55M-A-USB3.CAP 8390656 2012-07-13 17:30:48 Note [Enter] Select or Load [Tab] Switch [V] Drive Info [Up/Down/Home/End] Move [B] Backup [Esc] Exit

1. Press to switch between screen fields and use the keys to select the BIOS file and press . BIOS Updater checks the selected BIOS file and prompts you to confirm BIOS update.

Are you sure to update BIOS? Yes No

1. Select Yes and press . When BIOS update is done, press to exit BIOS Updater. Restart your computer.

DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure!

- For BIOS Updater version 1.30 or later, the utility automatically exits to the DOS prompt after updating BIOS.

- Ensure to load the BIOS default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu. Refer to section 2.9 Exit menu for details.

- Ensure to connect all SATA hard disk drives after updating the BIOS file if you have disconnected them.

2.2 BIOS setup program

Use the BIOS Setup program to update the BIOS or configure its parameters. The BIOS screens include navigation keys and brief online help to guide you in using the BIOS Setup program.

Entering BIOS Setup at startup

To enter BIOS Setup at startup:

- Press during the Power-On Self Test (POST). If you do not press , POST continues with its routines.

Entering BIOS Setup after POST

To enter BIOS Setup after POST:

• Press ++ simultaneously.
• Press the reset button on the system chassis.
• Press the power button to turn the system off then back on. Do this option only if you failed to enter BIOS Setup using the first two options.

Using the power button, reset button, or the ++ keys to force reset from a running operating system can cause damage to your data or system. We recommend to always shut down the system properly from the operating system.

• The BIOS setup screens shown in this section are for reference purposes only, and may not exactly match what you see on your screen.
• Ensure that a USB mouse is connected to your motherboard if you want to use the mouse to control the BIOS setup program.
• The default BIOS settings for this motherboard apply for most conditions to ensure optimum performance. If the system becomes unstable after changing any BIOS settings, load the default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit Menu. See section 2.9 Exit Menu.
• If the system fails to boot after changing any BIOS setting, try to clear the CMOS and reset the motherboard to the default value. Refer to section 1.7 Jumpers on how to erase the RTC RAM.
• The BIOS setup program does not support the bluetooth devices.

BIOS menu screen

The BIOS setup program can be used under two modes: EZ Mode and Advanced Mode. You can change modes from the Exit menu or from the Exit/Advanced Mode button in the EZ Mode/Advanced Mode screen.

EZ Mode

By default, the EZ Mode screen appears when you enter the BIOS setup program. The EZ Mode provides you an overview of the basic system information, and allows you to select the display language, system performance mode and boot device priority. To access the Advanced Mode, click Exit/Advanced Mode, then select Advanced Mode or press F7 hot key for the advanced BIOS settings.

The default screen for entering the BIOS setup program can be changed. Refer to the Setup Mode item in section 2.7 Boot menu for details.

Selects the display language of the BIOS setup program

Displays the CPU/motherboard temperature, CPU/5V/3.3V/12V voltage output, CPU/chassis fan speed

Exits the BIOS setup program without saving the changes, saves the changes and resets the system, or enters the Advanced Mode

ASUS UEFI BIOS Utility - EZ Mode 00:30 Tuesday(01/11/2011) A55M-A/USB3 BIOS Version : 820G CPU Type : AMD AB-5608K APU with Radeon(tx) HD Graphics Speed : 3600 MHz Total Memory : 4096 MB (DDR3 1333MHz) Temperature Voltaire Fan Speed CPU +129.2°F/-54.0°C CPU 1.400U 5U 5.120U MB +93.2°F/-34.0°C 3.3V 3.328V 12V 12.080V CPU_FAN 25548PH CHA_FAN N/A Q-Fan Control Quiet Performance Energy Saving The advanced options or the hardware setup have been changed Boot Priority Use the mouse to drag or keyboard to navigate to decide the boot priority. Shortcut(F3) Advanced Mode(F7) Boot Menu(FD) Default(FS) Selects the Advanced mode functions Selects the boot device priority Silent mode Standard mode Loads optimized default Turbo mode Selects the boot device priority Displays the system properties of the selected mode on the right hand side Displays the Advanced mode menus

• The boot device options vary depending on the devices you installed to the system.
• The Boot Menu(F8) button is available only when the boot device is installed to the system.

Advanced Mode

The Advanced Mode provides advanced options for experienced end-users to configure the BIOS settings. The figure below shows an example of the Advanced Mode. Refer to the following sections for the detailed configurations.

To access the EZ Mode, click Exit, then select ASUS EZ Mode.

Back button Menu items Menu bar Configuration fields General help ASUS UEFI BIOS Utility - Advanced Mode Main AI Tweaker Advanced Monitor Boot Tool Back Advanced\ CPU Configuration > Max Speed:3608 MHz: Intended Speed:3608 MHz Microcode Patch Level: 6001116 ---- Cache per Core ---- L1 Instruction Cache: 32 KB/2-way L1 Data Cache: 16 KB/4-way L2 Cache: 1024 KB/16-way No L3 Cache Present Enable/disable No-execute page protection Function AMD PowerNow Function NX Mode SUM Mode CPB Mode C6 Mode IOPNU Bank Interleaving Channel Interleaving Core Leveling Mode NK Mode Disabled Enabled Auto Enabled Disabled Enabled Enabled Automatic node Pop-up window Scroll bar Navigation keys +: Select Screen +4: Select Item Enter: Select +/-: Change Opt. F1: General Help F2: Previous Values F3: Shortcut F5: Optimized Defaults F10: Save ESC: Exit F12: Print Screen Version 2.10.1288. Copyright © 2012 American Megatrends, Inc.

Menu bar

The menu bar on top of the screen has the following main items:

Main For changing the basic system configuration

Ai Tweaker For changing the overclocking settings

Advanced For changing the advanced system settings

Monitor For displaying the system temperature, power status, and changing the fan settings

Boot For changing the system boot configuration

Tool For configuring options for special functions

Exit For selecting the exit options and loading default settings

Menu items

The highlighted item on the menu bar displays the specific items for that menu. For example, selecting Main shows the Main menu items.

The other items (Ai Tweaker, Advanced, Monitor, Boot, Tool, and Exit) on the menu bar have their respective menu items.

Back button

This button appears when entering a submenu. Press or use the USB mouse to click this button to return to the previous menu screen.

Submenu items

A greater than sign (>) before each item on any menu screen means that the item has a submenu. To display the submenu, select the item and press or double-click the item.

Pop-up window

Select a menu item and press to display a pop-up window with the configuration options for that item.

Scroll bar

A scroll bar appears on the right side of a menu screen when there are items that do not fit on the screen. Press the Up/Down arrow keys or / keys to display the other items on the screen.

Navigation keys

At the bottom right corner of the menu screen are the navigation keys for the BIOS setup program. Use the navigation keys to select items in the menu and change the settings.

General help

At the top right corner of the menu screen is a brief description of the selected item.

Configuration fields

These fields show the values for the menu items. If an item is user-configurable, you can change the value of the field opposite the item. You cannot select an item that is not user-configurable.

A configurable field is highlighted when selected. To change the value of a field, select it and press or click on it to display a list of options.

2.3 Main menu

The Main menu screen appears when you enter the Advanced Mode of the BIOS Setup program. The Main menu provides you an overview of the basic system information, and allows you to set the system date, time, language, and security settings.

ASUS UEFI BIOS Utility - Advanced Mode Main AI Tweaker Advanced Monitor Boot Tool BIOS Information BIOS Version Build Date 02/06 x54 01/07/2013 CPU Information AMD AB-5600K APU with Radeon(tm) HD Graphics Speed 3680 MHz Memory Information Total Memory Spend 4956 MD (DDR3) 1333 MHz System Language English System Date System Time Access Level Thursday 01/11/2011 100:31:39! Administrator -> Security Choose the system default language ++: Select Screen T4: Select Item Enter: Select +/-: Change Dot.

2.3.1 System Language [English]

Allows you to choose the BIOS language version from the options. Configuration options: [English] [Français] [Español] [Deutsch] [Русский] [日本語] [繁體中文] [简体中文]

2.3.2 System Date [Day xx/xx/xxxx]

Allows you to set the system date.

2.3.3 System Time [xx:xx:xx]

Allows you to set the system time.

2.3.4 Security

The Security menu items allow you to change the system security settings.

• If you have forgotten your BIOS password, erase the CMOS Real Time Clock (RTC) RAM to clear the BIOS password. See section 1.7 Jumpers for information on how to erase the RTC RAM.
• The Administrator or User Password items on top of the screen show the default Not Installed. After you set a password, these items show Installed.

Administrator Password

If you have set an administrator password, we recommend that you enter the administrator password for accessing the system. Otherwise, you might be able to see or change only selected fields in the BIOS setup program.

To set an administrator password:

1. Select the Administrator Password item and press .
2. From the Create New Password box, key in a password, then press .
3. Confirm the password when prompted.

To change an administrator password:

1. Select the Administrator Password item and press .
2. From the Enter Current Password box, key in the current password, then press .
3. From the Create New Password box, key in a new password, then press .
4. Confirm the password when prompted.

To clear the administrator password, follow the same steps as in changing an administrator password, but press when prompted to create/confirm the password. After you clear the password, the Administrator Password item on top of the screen shows Not Installed.

User Password

If you have set a user password, you must enter the user password for accessing the system. The User Password item on top of the screen shows the default Not Installed. After you set a password, this item shows Installed.

To set a user password:

1. Select the User Password item and press .
2. From the Create New Password box, key in a password, then press .
3. Confirm the password when prompted.

To change a user password:

1. Select the User Password item and press .
2. From the Enter Current Password box, key in the current password, then press .
3. From the Create New Password box, key in a new password, then press .
4. Confirm the password when prompted.

To clear the user password, follow the same steps as in changing a user password, but press when prompted to create/confirm the password. After you clear the password, the User Password item on top of the screen shows Not Installed.

2.4 Ai Tweaker menu

The Ai Tweaker menu items allow you to configure overclocking-related items.

Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect field values can cause the system to malfunction.

The configuration options for this section vary depending on the CPU and DIMM model you installed on the motherboard.

Target CPU Speed : 350MHz Target DWM Speed : 133MHz AI Overclock Timer Auto Memory Frequency Auto APU Multiplier Auto NS Frequency Auto CPU Power Saving Mode Disabled > DWM Timing Control APU Voltage Offset Mode CPU Offset Mode Sign - CPU Offset Voltage 1.312V Auto VDDMB Offset Mode Sign - VDDMB Offset Voltage 1.187V Auto Select the target CPUfrequency, and the relevant parameters will be auto-adjusted. ++: Select Screen TI: Select Item Enter: Select -/-: Change Opt. F1: General Help F2: Previous Values F3: Shortcut F5: Optimized Defaults F10: Save EXC: Exit F12: Print Screen Version 2.10.1200. Copyright © 2012 American Megatrends, Inc.

Scroll down to display the following items:

CPU Offset Voltage 1.312V Auto UDDMB Offset Mode Sign UDDMB Offset Voltage 1.187V Auto DRAM Voltage 1.500V Auto S$ 1.10 Voltage 1.100V Auto DIGI - UDM CPU Load Line Calibration Auto CPU/MB Load Line Calibration Auto CPU Current Capability 100% CPU/MB Current Capability 100% CPU Power Phase Control Standard CPU Voltage Frequency 300 CPU Power Duty Control T Probe current and thermal of every UDM phase component. Select IT-Probel to maintain UDM thermal balance or (Extremel) to maintain UDM current balance. (1) T-Probe: Thermal balance (2) Extreme: Current balance - Do not remove the thermal module. The thermal conditions should be monitored. ++: Select Screen 14: Select Item Enter: Select +/-: Change Opt. F1: General Help F2: Previous Values F3: Shortcut F5: Optimized Defaults F10: Save ESC: Exit F12: Print Screen Version 2.10.1208. Copyright (C) 2012 American Negatrends, Inc.

Target CPU Speed : xxxxMHz

Displays the current CPU speed.

Target DRAM Speed : xxxxMHz

Displays the current DRAM speed.

2.4.1 Ai Overclock Tuner [Auto]

Allows you to select the CPU overclocking options to achieve the desired CPU internal frequency. Select any of these preset overclocking configuration options:

[Auto] Loads the optimal settings for the system.

[Manual] Allows you to individually set overclocking parameters.

APU Frequency [XXX]

This item appears only when you set the Ai Overclock Tuner item to [Manual]. Use the <+> and <-> keys to adjust the value. You can also key in the desired value using the numeric keypad. The values range from 90.0MHz to 300.0MHz.

2.4.2 Memory Frequency [Auto]

Allows you to set the memory operating frequency. Configuration options: [Auto] [DDR3-800MHz] [DDR3-1066MHz] [DDR3-1333MHz] [DDR3-1600MHz] [DDR3-1866MHz]

Selecting a very high memory frequency may cause the system to become unstable! If this happens, revert to the default setting.

2.4.3 APU Multiplier [Auto]

Allows you to set the multiplier between the CPU Core Clock and the FSB Frequency. Use the <+> and <-> keys to adjust the ratio. The valid value ranges vary according to your CPU model.

2.4.4 NB Frequency [Auto]

Allows you to adjust the NB frequency. Use the <+> and <-> keys to adjust the value. You can also key in the desired value using the numeric keypad.

2.4.5 EPU Power Saving Mode [Disabled]

Allows you to enable or disable the EPU power saving function. Configuration options: [Disabled] [Enabled]

EPU Setting [Auto]

This item appears only when The EPU Power Saving Mode is set to [Enabled] and allows you to set power saving mode. Configuration options: [Auto] [Light Power Saving Mode] [Medium Power Saving Mode] [Max Power Saving Mode]

2.4.6 DRAM Timing Control

The sub-items in this menu allow you to set the DRAM timing control features. Use the <+> and <-> keys to adjust the value. To restore the default setting, type [auto] using the keyboard and press .

Changing the values in this menu may cause the system to become unstable! If this happens, revert to the default settings.

2.4.7 APU Voltage [Offset Mode]

[Offset Mode] To offset the voltage by a positive or negative value.

CPU Offset Mode Sign [+]

[+] To offset the voltage by a positive value.
[-] To offset the voltage by a negative value.

CPU Offset Voltage [Auto]

Allows you to set the CPU Offset voltage. The values range from 0.00625V to 0.500V with a 0.00625V interval.

Refer to the CPU documentation before setting the CPU voltage. Setting a high voltage may damage the CPU permanently, and setting a low voltage may make the system unstable.

VDDNB Offset Mode Sign [+]

[+] To offset the voltage by a positive value.
[-] To offset the voltage by a negative value.

VDDNB Offset Voltage [Auto]

Allows you to set the VDDNB Offset voltage. The values range from 0.00625V to 0.500V with a 0.00625V interval.

2.4.8 DRAM Voltage [Auto]

Allows you to set the DRAM voltage. The values range from 1.35V to 1.65V with a 0.15V interval.

2.4.9 SB 1.1V Voltage [Auto]

Allows you to set the Southbridge 1.1V voltage. The values range from 1.1V to 1.22V with a 0.04V interval.

• The values of the CPU Offset Voltage, VDDNB Offset Voltage, DRAM Voltage, and SB 1.1V Voltage items are labeled in a different color, indicating the risk levels of high voltage settings.
• The system may need a better cooling system to work properly under high voltage settings.

2.4.10 DIGI+ VRM

CPU Load Line Calibration [Auto]

Load-line Calibration is defined by AMD VRM specifications and affects CPU voltage. The CPU working voltage will decrease proportionally to CPU loading. Higher load-line calibration would get higher voltage and better overclocking performance, but increase the CPU and VRM thermal. This item allows you to adjust the voltage range from the following percentages to boost the system performance. Configuration options: [Auto] [Regular] [Medium] [High] [Extreme]

The actual performance boost may vary depending on your CPU specification.

CPU/NB Load Line Calibration [Auto]

Allows you to select the CPU/NB Load-Line Calibration mode. Configuration options: [Auto] [Regular] [High] [Extreme]

CPU Current Capability [100%]

This item provides wider total power range for overclocking. A higher value brings a wider total power range and extends the overclocking frequency range simultaneously. Configuration options: [100%] [110%] [120%] [130%]

CPU/NB Current Capability [100%]

This item provides wider total power range for overclocking. A higher value brings a wider total power range and extends the overclocking frequency range simultaneously. Configuration options: [100%] [110%] [120%] [130%]

CPU Power Phase Control [Standard]

Phase number is the number of working VRM phase. Increasing phase number under heavy system loading to get more transient and better thermal performance. Reducing phase number under light system loading to increase VRM efficiency.

[Standard] Proceeds phase control depending on the CPU loading.

[Optimized] Loads the ASUS optimized phase tuning profile.

[Extreme] Proceeds the full phase mode.

[Manual Adjustment] Allows manual adjustment.

CPU Voltage Frequency [300]

Switching frequency will affect the VRM transient response and component thermal. Setting a higher frequency gets faster transient response. Use the <+> and <-> keys to adjust the value. The values range from 200k Hz to 350k Hz with a 50k Hz interval.

CPU Power Duty Control [T.Probe]

[T.Probe] Maintains the VRM thermal balance.

[Extreme] Maintains the VRM current balance.

Do not remove the thermal module while changing the DIGI+VRM related parameters. The thermal conditions should be monitored.

2.5 Advanced menu

The Advanced menu items allow you to change the settings for the CPU and other system devices.

Be cautious when changing the settings of the Advanced menu items. Incorrect field values can cause the system to malfunction.

USEI BIOS Utility - Advanced Mode Main AI Speaker Advanced Monitor Boot Tool CPU Configuration SATA Configuration USB Configuration NB Configuration Onboard Devices Configuration NPM Network Stack CPU Configuration Parameters ---: Select Screen T4: Select Item Enter: Select +/-: Change Opt. F1: General Help F2: Previous Values F3: Shortcut F5: Optimized Defaults F10: Save ESC: Exit F12: Print Screen Version 2.18.1208. Copyright (C) 2012 American Negatrends, Inc.

2.5.1 CPU Configuration

The items in this menu show the CPU-related information that the BIOS automatically detects.

The items shown in submenu may be different due to the CPU you installed.

AMD PowerNow function [Enabled]

Enables or disables the AMD PowerNow function. Configuration options: [Enabled] [Disabled]

NX Mode [Enabled]

Enables or disables the No-execute page protection function. Configuration options: [Enabled] [Disabled]

SVM [Enabled]

Enables or disables CPU virtualization. Configuration options: [Disabled] [Enabled]

CPB Mode [Auto]

Disables the CPB (Core Performance Boost) mode or set it to [Auto] for automatic configuration. Configuration options: [Disabled] [Auto]

C6 Mode [Enabled]

Enables or disables C6 mode. Configuration options: [Enabled] [Disabled]

IOMMU [Disabled]

Set this item to [Enabled] to show IOMMU Mode. Configuration options: [Enabled] [Disabled]

Bank Interleaving [Enabled]

Enables or disables Bank Interleaving. Configuration options: [Enabled] [Disabled]

Channel Interleaving [Enabled]

Enables or disables Channel Interleaving. Configuration options: [Enabled] [Disabled]

Core Leveling Mode [Automatic mode]

Adjust ratio of number of cores per processor or per compute unit Configuration options: [Automatic mode] [One core per processor] [One Compute Unit] [One core per Compute Unit]

2.5.2 SATA Configuration

While entering Setup, the BIOS automatically detects the presence of SATA devices. The SATA Port items show Not Present if no SATA device is installed to the corresponding SATA port.

OnChip SATA Channel [Enabled]

Enables or disables onboard channel SATA port. Configuration options: [Disabled] [Enabled]

OnChip SATA Type [AHCI]

Allows you to set the SATA configuration.

[IDE] Set to [IDE] when you want to use the Serial ATA hard disk drives as

Parallel ATA physical storage devices.

[RAID] Set to [RAID] when you want to create a RAID configuration from the SATA

hard disk drives.

[AHCI] Set to [AHCI] when you want the SATA hard disk drives to use the AHCI

(Advanced Host Controller Interface). The AHCI allows the onboard storage driver to enable advanced Serial ATA features that increases storage performance on random workloads by allowing the drive to internally optimize the order of commands.

S.M.A.R.T. Status Check [Enabled]

S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is a monitor system. When read/write of your hard disk errors occur, this feature allows the hard disk to report warning messages during the POST. Configuration options: [Enabled] [Disabled]

2.5.3 USB Configuration

The items in this menu allow you to change the USB-related features.

The USB Devices item shows the auto-detected values. If no USB device is detected, the item shows None.

USB Device Enable [Enabled]

[Enabled] Enables available USB devices.

[Disabled] Disables available USB devices.

Legacy USB Support [Enabled]

[Enabled] Enables the support for USB devices on legacy operating systems (OS).

[Disabled] The USB devices can be used only for the BIOS setup program.

[Auto] Allows the system to detect the presence of USB devices at startup. If detected, the USB controller legacy mode is enabled. If no USB device is detected, the legacy USB support is disabled.

Legacy USB3.0 Support [Enabled] (A55M-A/USB3 only)

[Enabled] Enables the support for USB 3.0 devices on legacy operating systems (OS).

[Disabled] Disables the function.

EHCI Hand-off [Disabled]

[Enabled] Enables the support for operating systems without an EHCI hand-off feature.

[Disabled] Disables the function.

USB Single Port Control

Allows you to enable/disable individual USB ports.

2.5.4 NB Configuration

IGFX Multi-Monitor [Disabled]

Enables or disables the Internal Graphics Device Multi-Monitor support for add-on VGA devices. And the memory size of Internal Graphics Device will keep memory reserved.

Configuration options: [Disabled] [Enabled]

Primary Video Device [PCIE / PCI Video]

Selects the primary display device. Configuration options: [IGFX Video] [PCIE / PCI Video]

Integrated Graphics [Auto]

Enables the integrated graphics controller. Configuration options: [Auto] [Force]

2.5.5 Onboard Devices Configuration

HD Audio Device [Enabled]

[Enabled] Enables the High Definition Audio Controller.

[Disabled] Disables the controller.

The following two items appear only when you set the HD Audio Device item to [Enabled].

Front Panel Type [HD]

Allows you to set the front panel audio connector (AAFP) mode to legacy AC'97 or high-definition audio depending on the audio standard that the front panel audio module supports.

[HD] Sets the front panel audio connector (AAFP) mode to high definition audio.

[AC97] Sets the front panel audio connector (AAFP) mode to legacy AC'97.

SPDIF Out Type [SPDIF]

[SPDIF] Sets to [SPDIF] for SPDIF audio output.

[HDMI] Sets to [HDMI] for HDMI audio output.

Realtek LAN Controller [Enabled]

[Enabled] Enables the Realtek LAN controller.

[Disabled] Disables the controller.

Realtek PXE OPROM [Disabled]

This item appears only when you set the Realtek LAN Controller item to [Enabled] and allows you to enable or disable the Rom Help of the Realtek LAN controller. Configuration options: [Enabled] [Disabled]

Asmedia USB 3.0 Controller [Enabled] (A55M-A/USB3 only)

[Enabled] Enables the onboard USB 3.0 controller.

[Disabled] Disables the controller.

Asmedia USB 3.0 Battery Charging Support [Disabled] (A55M-A/USB3 only)

This item appears only when the Asmedia USB 3.0 Controller item is set to [Enabled].

[Enabled] Enables the Asmedia USB 3.0 battery charging function.

[Disabled] Disables this function

2.5.6 APM

Restore AC Power Loss [Power Off]

[Power On] The system goes into on state after an AC power loss.

[Power Off] The system goes into off state after an AC power loss.

[Last State] The system goes into either off or on state, whatever the system state was before the AC power loss.

Power On By PME [Disabled]

[Disabled] Disables the PME to wake up by PCI/PCIE devices.

[Enabled] Allows you to turn on the system through a PCI/PCIE LAN or modem card. This feature requires an ATX power supply that provides at least 1A on the +5VSB lead.

Power On By RTC [Disabled]

[Disabled] Disables RTC to generate a wake event.

[Enabled] When set to [Enabled], the items RTC Alarm Date (Days) and Hour/Minute/Second will become user-configurable with set values.

RTC Alarm Date (Days)

This item appears only when you set the previous item to [Enabled] and allows you to select RTC alarm time (days). When you set the time to zero, the RTC alarms everyday. Use <+> and <-> keys to adjust the time.

- Hour / - Minute / - Second

Allows you to set the RTC alarm time. Use <+> and <-> keys to adjust the time.

2.5.7 Network Stack

Network Stack [Disabled]

This item allows user to disable or enable the UEFI network stack. Configuration options: [Disabled] [Enabled]

Ipv4 PXE Support [Enabled]

This item appears only when you set the Network Stack item to [Enabled]. When this item is disabled, the IPV4 PXE boot option will not be created. Configuration options: [Disabled] [Enabled]

Ipv6 PXE Support [Enabled]

This item appears only when you set the Network Stack item to [Enabled]. When this item is disabled, the IPV6 PXE boot option will not be created. Configuration options: [Disabled] [Enabled]

2.6 Monitor menu

The Monitor menu displays the system temperature/power status, and allows you to change the fan settings.

ASUS UEFI BIOS Utility - Advanced Mode Main Alt Speaker Advanced Monitor Boot Tool CPU Temperature +55°C / +131°F CPU Temperature MB Temperature +36°C / +36°F CPU Fan Speed 3000 RPM Chassis Fan Speed N/A CPU Voltage +1.392 V 3.30 Voltage +3.328 V 5V Voltage +5.128 V 120 Voltage +12,000 V CPU Q-Fan Control Enabled + CPU Fan Speed Low Limit 200 RPM CPU Fan Profile Standard Anti Surge Support Auto + +: Select Screen T4: Select Item Enter: Select +/-: Change Opt F1: General Help F2: Previous Values F3: Shortset F5: Optimized Defaults F10: Save CRC: Exit F12: Print Screen Version 2-10-1208. Copyright (C) 2012 American Megatrends, Inc.

2.6.1 CPU Temperature / MB Temperature [xxx°C/xxx°F]

The onboard hardware monitor automatically detects and displays the CPU and motherboard temperatures. Select Ignore if you do not wish to display the detected temperatures.

2.6.2 CPU / Chassis fan Speed [xxxx RPM] or [Ignore] / [N/A]

The onboard hardware monitor automatically detects and displays the CPU / chassis fan speeds in rotations per minute (RPM). If the fan is not connected to the motherboard, the field shows N/A. Select Ignore if you do not wish to display the detected speed.

2.6.3 CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage

The onboard hardware monitor automatically detects the voltage output through the onboard voltage regulators. Select Ignore if you do not want to detect this item.

2.6.4 CPU Q-Fan Control [Enabled]

[Disabled] Disables the CPU Q-Fan control feature.

[Enabled] Enables the CPU Q-Fan control feature.

Fan Speed Low Limit [200 RPM]

This item appears only when you enable the CPU Q-Fan Control feature and allows you to disable or set the CPU fan warning speed. Configuration options: [Ignore] [200RPM] [300 RPM] [400 RPM] [500 RPM] [600 RPM]

Fan Profile [Standard]

This item appears only when you enable the CPU Q-Fan Control feature and allows you to set the appropriate performance level of the CPU fan.

[Standard] Sets to [Standard] to make the CPU fan automatically adjust depending on the CPU temperature.

[Silent] Sets to [Silent] to minimize the fan speed for quiet CPU fan operation.

[Turbo] Sets to [Turbo] to achieve maximum CPU fan speed.

[Manual] Sets to [Manual] to assign detailed fan speed control parameters.

The following four items appear only when you set CPU Profile to [Manual].

CPU\_FAN Upper Temperature [70°C]

Use the <+> and <-> keys to adjust the upper limit of the CPU temperature. The values range from 20°C to 90°C.

CPU\_FAN Fan Max. Duty Cycle(%) [100%]

Use the <+> and <-> keys to adjust the maximum CPU fan duty cycle. The values range from 40% to 100%. When the CPU temperature reaches the upper limit, the CPU fan will operate at the maximum duty cycle.

CPU\_FAN Lower Temperature [20°C]

Displays the lower limit of the CPU temperature.

CPU\_FAN Fan Min. Duty Cycle(%) [40%]

Use the <+> and <-> keys to adjust the minimum CPU fan duty cycle. The values range from 40% to 100%. When the CPU temperature is under the lower limit, the CPU fan will operate at the minimum duty cycle.

2.6.5 Anti Surge Support [Auto]

This item allows you to enable or disable the Anti Surge function. Configuration options: [Auto] [Disabled] [Enabled]

2.7 Boot menu

The Boot menu items allow you to change the system boot options.

ASUS UEFI BIOS Utility - Advanced Mode Main AI Tweaker Advanced Monitor Boot Tool Boot Configuration Fast Boot Enabled USB Support Partial In... PS/2 Keyboard and Mouse Support Auto Network Stack Driver Support Disabled Next Boot after nC Power Loss Normal Boot Full Screen Logo Enabled POST Delay Time 3 sec Bootstrap MunLock State On Option ROM Messages Enabled Force BIOS Postponed Setup Mode EZ Mode Enabled/Disabled boot with Initialization of a minimal set of devices required to launch active boot option. Bus no effect for BBS boot options. ++: Select Screen F1: Select Item Enter: Select +/-: Change Opt. F1: General Help F2: Previous Values F3: Shortout F5: Optimized Defaults F10: Save ESC: Exit F12: Print Screen Version 2.19.1208. Copyright © 2012 American Megatrends, Inc.

Scroll down to display the following items:

Interrupt 19 Capture Setup Mode > CSM (Compatibility Support Module) > Secure Boot Boot Option Priorities Boot Option #1 Boot Option #2 > Hard Drive HBS Priorities Postponed E2 Mode KingstonDT... UEFI: King... **: Select Screen #: Select Item Enter: Select +/-: Change Opt. F1: General Help F2: Previous Values F3: Shortcut F5: Optimized Defaults F10: Save ESC: Exit F12: Print Screen Version 2.10.1200. Copyright (C) 2012 American Megatrends, Inc.

2.7.1 Fast Boot [Enabled]

Enable or disable boot with initialization of a minimal set of devices to launch active boot option. Configuration options: [Disabled] [Enabled]

The following three items appear only when you set Fast Boot to [Enabled].

USB Support [Partial Initialization]

[Disabled] All USB devices will not be available until OS boot up for the fastest possible POST time.

[Full Initialization] All USB devices will be available during POST. This process will extend POST time.

[Partial Initialization] For a faster POST time, only the USB ports with keyboard and mouse connections will be detected.

PS/2 Keyboard and Mouse Support [Auto]

[Auto] For a faster POST time, PS/2 devices are available when the system boots up or rebooted as long as the PS/2 devices have not been reconnected or changed.

[Full Initialization] For full system control, PS/2 devices are available during POST. This setting will extend POST time.

[Disabled] For a shorter POST time, all PS/2 devices are available only after the PC enters the OS.

Network Stack Driver Support [Disabled]

[Disabled] If Disabled, the Network Stack Driver will be skipped. To enable this feature, enable the Network Stack item in the Advanced menu.

[Enabled] Allows the BIOS to boot from the Network Stack Driver.

Next boot after AC Power Loss [Normal Boot]

[Normal Boot] Returns to normal boot on the next boot after an AC power loss.

[Fast Boot] Accelerates the boot speed on the next boot after an AC power loss.

2.7.2 Full Screen Logo [Enabled]

[Enabled] Enables the full screen logo display feature.

[Disabled] Disables the full screen logo display feature.

Set this item to [Enabled] to use the ASUS MyLogo 2 ^TM feature.

Post Report [5 sec]

This item appears only when the Full Screen Logo item is set to [Disabled] and allows you to set the waiting time for the system to display the post report. Configuration options: [1 sec] [2 sec] [3 sec] [4 sec] [5 sec] [6 sec] [7 sec] [8 sec] [9 sec] [10 sec] [Until Press ESC]

2.7.3 Post Delay Time [3 sec]

Allows you to set the POST Report wait time. This configuration only functions in Normal Boot mode. Configuration options: [0 sec] [1 sec] [2 sec] [3 sec] [4 sec] [5 sec] [6 sec] [7 sec] [8 sec] [9 sec] [10 sec]

2.7.4 Bootup NumLock State [On]

[On] Sets the power-on state of the NumLock to [On].

[Off] Sets the power-on state of the NumLock to [Off].

2.7.5 Wait for 'F1' If Error [Enabled]

When this item is set to [Enabled], the system waits for the F1 key to be pressed when error occurs. Configuration options: [Disabled] [Enabled]

2.7.6 Option ROM Messages [Force BIOS]

[Force BIOS] The third-party ROM messages will be forced to display during the boot sequence.

[Keep Current] The third-party ROM messages will be displayed only if the third-party manufacturer had set the add-on device to do so.

2.7.7 Interrupt 19 Capture [Postponed]

[Immediate] Immediately capture Interrupt 19 during boot process.

[Postponed] Postpone capture of Interrupt 19 during boot process.

2.7.8 Setup Mode [EZ Mode]

[Advanced Mode] Sets Advanced Mode as the default screen for entering the BIOS setup program.

[EZ Mode] Sets EZ Mode as the default screen for entering the BIOS setup program.

2.7.9 CSM Parameters

This option controls whether or not CSM (Compatibility Support Module) will be launched.

Launch CSM [Auto]

Configuration option: [Auto] [Enabled] [Disabled]

The following four items appear only when you set Launch CSM to [Enabled].

Boot Device Control [UEFI and Legacy OpROM]

Configuration option: [UEFI and Legacy OpRom] [Legacy OpROM only] [UEFI only]

Boot from Network Devices [Legacy OpROM first]

Configuration option: [Legacy OpROM first] [UEFI driver first] [Ignore]

Boot from Storage Devices [Legacy OpRom first]

Configuration option: [Both, Legacy OpROM first] [Both, UEFI driver first] [Legacy OpROM first] [UEFI driver first] [Ignore]

Boot from PCIe/PCI Expansion Devices [Legacy OpROM first]

Configuration option: [Legacy OpROM first] [UEFI driver first]

2.7.10 Secure Boot

This option allows you to configure the Secure Boot related parameters.

OS Type [Other OS]

Configuration option: [Windows UEFI mode] [Other OS]

Secure Boot Mode [Standard]

This item appears only when you set the OS Type to [Windows UEFI]. Configuration option: [Standard] [Custom]

The following items appear when Secure Boot Mode is set to [Custom].

Key Management

Manage the Secure Boot Keys (PK, KEK, DB, DBX)

Install default Secure Boot Keys

Configuration options: [Yes] [No]

Platform Key (PK)

Load PK from File

Configuration options: [Ok]

Copy PK to File

Configuration options: [Ok]

Delete the PK

Configuration options: [Yes] [No]

KEK Management (KEK)

Load KEK from File

Configuration options: [Ok]

Copy KEK to File

Configuration options: [Ok]

Delete the KEK

Configuration options: [Yes] [No]

Append KEK from File

Configuration options: [Ok]

DB Management

Load DB from File

Configuration options: [Ok]

Copy DB to File

Configuration options: [Ok]

Delete the DB

Configuration options: [Yes] [No]

Append DB from File

Configuration options: [Ok]

DBX Management

Load DBX from File

Configuration options: [Ok]

Copy DBX to File

Configuration options: [Ok]

Delete the DBX

Configuration options: [Yes] [No]

Append DBX from File

Configuration options: [Ok]

2.7.11 Boot Option Priorities

These items specify the boot device priority sequence from the available devices. The number of device items that appears on the screen depends on the number of devices installed in the system.

• To select the boot device during system startup, press when ASUS Logo appears.
• To access Windows OS in Safe Mode, press after POST.

2.7.12 Boot Override

These items displays the available devices. The number of device items that appears on the screen depends on the number of devices installed in the system. Click an item to start booting from the selected device.

2.8 Tools menu

The Tools menu items allow you to configure options for special functions. Select an item then press to display the submenu.

ASUS UEFI BIOS Utility - Advanced Mode Exit Main AI Tweaker Advanced Monitor Boot Tool > ASUS EZ Flash 2 Utility > ASUS SPD Information > ASUS O.C. Profile Be used to update BIOS

2.8.1 ASUS EZ Flash 2 Utility

Allows you to run ASUS EZ Flash 2. Press [Enter] to launch the ASUS EZ Flash 2 screen.

For more details, see section 2.1.2 ASUS EZ Flash 2.

2.8.2 ASUS SPD Information

DIMM Slot # [DIMM\_A1]

Displays the Serial Presence Detect (SPD) information of the DIMM module installed on the selected slot. Configuration options: [DIMM_A1] [DIMM_B1]

2.8.3 ASUS O.C. Profile

This item allows you to store or load multiple BIOS settings.

The Setup Profile Status items show Not Installed if no profile is created.

Label

Allows you to input the label of the setup profile.

Save to Profile

Allows you to save the current BIOS settings to the BIOS Flash, and create a profile. Key in a profile number from one to eight, press , and then select Yes.

Load from Profile

Allows you to load the previous BIOS settings saved in the BIOS Flash. Key in the profile number that saved your CMOS settings, press , and then select Yes.

- DO NOT shut down or reset the system while updating the BIOS to prevent the system boot failure!

- We recommend that you update the BIOS file only coming from the same memory/CPU configuration and BIOS version.

2.9 Exit menu

The Exit menu items allow you to load the optimal default values for the BIOS items, and save or discard your changes to the BIOS items. You can access the EZ Mode from the Exit menu.

Exit Load Optimized Defaults Save Changes & Reset Discard Changes & Exit ASUS E2 Mode Launch EFI Shell from filesystem device

Load Optimized Defaults

This option allows you to load the default values for each of the parameters on the Setup menus. When you select this option or if you press , a confirmation window appears. Select Yes to load the default values.

Save Changes & Reset

Once you are finished making your selections, choose this option from the Exit menu to ensure the values you selected are saved. When you select this option or if you press , a confirmation window appears. Select Yes to save changes and exit.

Discard Changes & Exit

This option allows you to exit the Setup program without saving your changes. When you select this option or if you press , a confirmation window appears. Select Yes to discard changes and exit.

ASUS EZ Mode

This option allows you to enter the EZ Mode screen.

Launch EFI Shell from filesystem device

This option allows you to attempt to launch the UEFI Shell application (shellx64.efi) from one of the available devices that have a filesystem.

Appendices

Notices

Federal Communications Commission Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

• This device may not cause harmful interference.
- This device must accept any interference received including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with manufacturer's instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.

The use of shielded cables for connection of the monitor to the graphics card is required to assure compliance with FCC regulations. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.

IC: Canadian Compliance Statement

Complies with the Canadian ICES-003 Class B specifications. This device complies with RSS 210 of Industry Canada. This Class B device meets all the requirements of the Canadian interference-causing equipment regulations.

This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

Canadian Department of Communications Statement

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

This class B digital apparatus complies with Canadian ICES-003.

VCCI: Japan Compliance Statement

VCCI Class B Statement

情報処理装置等電波障害自主規制について

KC: Korea Warning Statement

B급 기기 (가정용 방송통신기자재)

Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulatory framework, we published the chemical substances in our products at ASUS REACH website at http://csr.asus.com/english/REACH.htm.

DO NOT throw the motherboard in municipal waste. This product has been designed to enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin indicates that the product (electrical and electronic equipment) should not be placed in municipal waste. Check local regulations for disposal of electronic products.

DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol of the crossed out wheeled bin indicates that the battery should not be placed in municipal waste.

ASUS Recycling/Takeback Services

ASUS recycling and takeback programs come from our commitment to the highest standards for protecting our environment. We believe in providing solutions for you to be able to responsibly recycle our products, batteries, other components as well as the packaging materials. Please go to http://csr.asus.com/english/Takeback.htm for detailed recycling information in different regions.

ASUS contact information

ASUSTeK COMPUTER INC.

Address 15 Li-Te Road, Peitou, Taipei, Taiwan 11259

Telephone [phone]

Fax [phone]

E-mail [e-mail]

Online support support.asus.com

ASUS COMPUTER INTERNATIONAL (America)

Address 800 Corporate Way, Fremont, CA 94539, USA

Telephone [phone]

Fax [phone]

Web site usa.asus.com

Technical Support

Telephone [phone]

Support fax [phone]

Online support support.asus.com

ASUS COMPUTER GmbH (Germany and Austria)

Address Harkort Str. 21-23, D-40880 Ratingen, Germany

Fax [phone]

Web site www.asus.de

Online support support.asus.com

* EUR 0.14/minute from a German fixed landline; EUR 0.42/minute from a mobile phone.

Manufacturer: ASUSTeK Computer Inc.
Address:	4F, No.150, LI-TE RD., PEITOU, TAIPEI 112, TAIWAN, R.O.C.
Authorised representative in Europe:	ASUS Computer GmbH
Address:	HARKORT STR. 21-23, 40880 RATINGEN, GERMANY

EC Declaration of Conformity

Manufacturer:	ASUSTeK COMPUTER INC.
Address, City:	4F, No. 150, LI-TE Rd., PEITOU, TAIPEI 112, TAIWAN
Country:	TAIWAN
Authorized representative in Europe:	ASUS COMPUTER GmbH
Address, City:	HARKORT STR. 21-23. 40880 RATINGEN
Country:	GERMANY

declare the following apparatus:

Product name : Motherboard

Model name: A55M-A/USB3.

conform with the essential requirements of the following directives:

2004/108/EC-EMC Directive

EN 55022:2010	EN 55024:2010
EN 61000-3-2:2006+A2:2009	EN 61000-3-3:2008
EN 55013:2001+A1:2003+A2:2006	EN 55020:2007+A11:2011

1999/5/EC-R &TTE Directive

EN 300 328 V1.7.1(2006-10)EN 300 440-1 V1.6.1(2010-08)EN 300 440-2 V1.4.1(2010-08)EN 301 511 V9.0.2(2003-03)EN 301 908-1 V5.2.1(2011-05)EN 301 908-2 V5.2.1(2011-07)EN 301 893 V1.6.1(2011-11)EN 302 544-2 V1.1.1(2008-01)EN 302 623 V1.1.1(2008-01)EN 300 330-1 V1.7.1(2010-02)EN 300 330-2 V1.5.1(2010-02)EN 50360:2001EN 62479:2010

EN 301 489-1 V1.9.2(2011-09)EN 301 489-3 V1.4.1(2002-08)EN 301 489-4 V1.4.1(2009-05)EN 301 489-7 V1.3.1(2005-11)EN 301 489-9 V1.4.1(2007-11)EN 301 489-17 V2.1.1(2009-05)EN 301 489-24 V1.5.1(2010-09)EN 302 326-2 V1.2.2(2007-06)EN 302 326-3 V1.3.1(2007-09)EN 301 357-2 V1.4.1(2008-11)EN 50385:2002EN 62311:2008

2006/95/EC-LVD Directive

EN 60950-1 / A11:2009EN 60950-1 / A12:2011

EN 60065:2002 / A2:2010EN 60065:2002 / A12:2011

2009/125/EC-ErP Directive

☐ Regulation (EC) No. 1275/2008☐ Regulation (EC) No. 642/2009

☐ Regulation (EC) No. 278/2009

Vgr. 121001

2011/65/EU-RoHS Directive

CE marking

(EC conformity marking)

Position: CEO

Name: Jerry Shen

Signature

Declaration Date: Jan. 23, 2013
Year to begin affixing CE marking:2013

Ver. 120601

Signature :

Jan. 23, 2013

DECLARATION OF CONFORMITY

Per FCC Part 2 Section 2. 1077(a)

Responsible Party Name: Asus Computer International

Address: 800 Corporate Way, Fremont, CA 94539.

Phone/Fax No: [phone]/[phone]

hereby declares that the product

Product Name : Motherboard

Model Number : A55M-A/USB3, A55M-A

Conforms to the following specifications:

☒ FCC Part 15, Subpart B, Unintentional Radiators

Supplementary Information:

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Representative Person's Name: Steve Chang / President

Signature :

Date :

[Non-Text]