B450 Steel Legend - Motherboard ASROCK - Free user manual and instructions

USER MANUAL B450 Steel Legend ASROCK

Published November 2020

Copyright©2020 ASRock INC. All rights reserved.

Copyright Notice:

No part of this documentation may be reproduced, transcribed, transmitted, or translated in any language, in any form or by any means, except duplication of documentation by the purchaser for backup purpose, without written consent of ASRock Inc.

Products and corporate names appearing in this documentation may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners' benefit, without intent to infringe.

Disclaimer:

Specifications and information contained in this documentation are furnished for informational use only and subject to change without notice, and should not be constructed as a commitment by ASRock. ASRock assumes no responsibility for any errors or omissions that may appear in this documentation.

With respect to the contents of this documentation, ASRock does not provide warranty of any kind, either expressed or implied, including but not limited to the implied warranties or conditions of merchantability or fitness for a particular purpose.

In no event shall ASRock, its directors, officers, employees, or agents be liable for any indirect, special, incidental, or consequential damages (including damages for loss of profits, loss of business, loss of data, interruption of business and the like), even if ASRock has been advised of the possibility of such damages arising from any defect or error in the documentation or product.

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.

CALIFORNIA, USA ONLY

The Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance controlled in Perchlorate Best Management Practices (BMP) regulations passed by the California Legislature. When you discard the Lithium battery in California, USA, please follow the related regulations in advance.

"Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/perchlorate"

ASRock Website: http://www.asrock.com

AUSTRALIA ONLY

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage caused by our goods. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. If you require assistance please call ASRock Tel: [phone] ext.123 (Standard International call charges apply)

The terms HDMI^® and HDMI High-Definition Multimedia Interface, and the HDMI logo are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries.

Motherboard Layout

No.Description

1 ATX 12V Power Connector (ATX12V1)
2 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
3 AMD Fan LED Header (AMD_FAN_LED1)
4 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
5 CPU/Water Pump Fan Connector (CPU_FAN2/WP)
6 CPU Fan Connector (CPU_FAN1)
7 ATX Power Connector (ATXPWR1)
8 USB 3.2 Gen1 Header (USB3_5_6)
9 SATA3 Connector (SATA3_1)
10 SATA3 Connector (SATA3_2)
11 SATA3 Connector (SATA3_A1)
12 SATA3 Connector (SATA3_A2)
13 SATA3 Connector (SATA3_3)
14 SATA3 Connector (SATA3_4)
15 System Panel Header (PANEL1)
16 Power LED and Speaker Header (SPK_PLED1)
17 Chassis/Water Pump Fan Connector (CHA_FAN3/WP)
18 Chassis/Water Pump Fan Connector (CHA_FAN2/WP)
19 Clear CMOS Jumper (CLRCMOS2)
20 Addressable LED Header (ADDR_LED1)
21 USB 2.0 Header (USB_3_4)
22 USB 2.0 Header (USB_1_2)
23 COM Port Header (COM1)
24 RGB LED Header (RGB_LED1)
25 TPM Header (TPMS1)
26 Front Panel Audio Header (HD_AUDIO1)
27 Chassis/Water Pump Fan Connector (CHA_FAN1/WP)

I/O Panel

No. Description No. Description

1 USB 2.0 Ports (USB_56) 9 USB 3.2 Gen2 Type-A Port (USB31_TA_1)
2 LAN RJ-45 Port* 10 USB 3.2 Gen2 Type-C Port (USB31_TC_1)
3 Central / Bass (Orange) 11 USB 3.2 Gen1 Ports (USB3_12)
4 Rear Speaker (Black) 12 USB 3.2 Gen1 Ports (USB3_34)***
5 Line In (Light Blue) 13 HDMI Port
6 Front Speaker (Lime)** 14 DisplayPort 1.2
7 Microphone (Pink) 15 PS/2 Mouse/Keyboard Port
8 Optical SPDIF Out Port

• There are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications.

ACT/LINK LED
LAN Port

Activity / Link LED Speed LED

Status Description Status Description

Off No Link Off 10Mbps connection

Blinking Data Activity Orange 100Mbps connection

On Link Green 1Gbps connection

** If you use a 2-channel speaker, please connect the speaker's plug into "Front Speaker Jack". See the table below for connection details in accordance with the type of speaker you use.

Audio Output Channels	Front Speaker (No. 6)	Rear Speaker (No. 4)	Central / Bass (No. 3)	Line In (No. 5)
2 V --- ---
4 V V --- ---
6 V V V ---
8 V V V V

*** Ultra USB Power is supported on USB3_34 ports. ACPI wake-up function is not supported on USB3_34 ports.

Chapter 1 Introduction

Thank you for purchasing ASRock B450 Steel Legend motherboard, a reliable motherboard produced under ASRock's consistently stringent quality control. It delivers excellent performance with robust design conforming to ASRock's commitment to quality and endurance.

Because the motherboard specifications and the BIOS software might be updated, the content of this manual will be subject to change without notice. In case any modifications of this manual occur, the updated version will be available on ASRock's website without further notice. If you require technical support related to this motherboard, please visit our website for specific information about the model you are using. You may find the latest VGA cards and CPU support list on ASRock's website as well. ASRock website http://www.asrock.com.

1.1 Package Contents

• ASRock B450 Steel Legend Motherboard (ATX Form Factor)
  ASRock B450 Steel Legend Quick Installation Guide
  ASRock B450 Steel Legend Support CD
• 1 x I/O Panel Shield
• 2 x Serial ATA (SATA) Data Cables (Optional)
• 2 × Screws for M.2 Sockets (Optional)
• 1 x Standoff for M.2 Socket (Optional)

1.2 Specifications

Platform	• ATX Form Factor
CPU	• AMD AM4 Socket • Digi Power design • 6 Power Phase design
Chipset	• AMD Promontory B450
Memory	• Dual Channel DDR4 Memory Technology • 4 x DDR4 DIMM Slots • AMD Ryzen series CPUs (Matisse) support DDR4 3200/2933/2667/2400/2133 ECC & non-ECC, un-buffered memory* • AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4 3533+(OC)/3200(OC)/2933(OC)/2667/2400/2133 ECC & non-ECC, un-buffered memory* • AMD Ryzen series CPUs (Picasso) support DDR4 2933/2667/2400/2133 non-ECC, un-buffered memory* • AMD Ryzen series CPUs (Summit Ridge) support DDR4 3466+(OC)/3200(OC)/2933(OC)/2667/2400/2133 ECC & non-ECC, un-buffered memory* • AMD Ryzen series CPUs (Raven Ridge) support DDR4 3466+(OC)/3200(OC)/2933/2667/2400/2133 non-ECC, un-buffered memory* * For Ryzen Series CPUs (Picasso and Raven Ridge), ECC is only supported with PRO CPUs. * Please refer to Memory Support List on ASRock's website for more information. (http://www.asrock.com/) * Please refer to page 22 for the table for AMD non-XMP memory frequency support. For more details, please refer to the QVL on ASRock's website. • Max. capacity of system memory: 64GB • Supports Extreme Memory Profile (XMP) memory modules • 15μ Gold Contact in DIMM Slots

Expansion Slot

AMD Ryzen series CPUs (Matisse, Summit Ridge and Pinnacle Ridge)

• 2 x PCI Express 3.0 x16 Slots (PCIE1: x16 mode; PCIE4: x4 mode)*

AMD Ryzen series CPUs (Picasso, Raven Ridge)

• 2 x PCI Express 3.0 x16 Slots (PCIE1: x8 mode; PCIE4: x4 mode)*

AMD Athlon series CPUs

• 2 x PCI Express 3.0 x16 Slots (PCIE1: x4 mode; PCIE4: x2 mode)*

• Supports NVMe SSD as boot disks

• If M2_1 is occupied, PCIE4 will be disabled.

• 4 x PCI Express 2.0 x1 Slots
  Supports AMD Quad CrossFireX™ and CrossFireX™

** This feature is only supported with Ryzen Series CPUs (Matisse, Summit Ridge, Pinnacle Ridge, Picasso and Raven Ridge).

Graphics

• Integrated AMD Radeon™ Vega Series Graphics in Ryzen Series APU*

• Actual support may vary by CPU

• DirectX 12, Pixel Shader 5.0

• Shared memory default 2GB. Max Shared memory supports up to 16GB.

• The Max shared memory 16GB requires 32GB system memory installed.

• Dual graphics output: Support HDMI and DisplayPort 1.2 ports by independent display controllers
  Supports HDMI 1.4 with max. resolution up to 4K× 2K (4096x2160) @ 24Hz / (3840x2160) @ 30Hz
  Supports DisplayPort 1.2 with max. resolution up to 4K× 2K (4096x2160) @ 60Hz
  Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 1.4 Port (Compliant HDMI monitor is required)
  Supports HDCP 1.4 with HDMI 1.4 and DisplayPort 1.2 Ports
  Supports 4K Ultra HD (UHD) playback with HDMI 1.4 and DisplayPort 1.2 Ports

Audio

7.1 CH HD Audio with Content Protection (Realtek ALC892/897 Audio Codec)
Supports Surge Protection
PCB Isolate Shielding
- Individual PCB Layers for R/L Audio Channel
Gold Audio Jacks

LAN

PCIE x1 Gigabit LAN 10/100/1000 Mb/s
Realtek RTL8111H
Supports Wake-On-LAN
Supports Lightning/ESD Protection
Supports Energy Efficient Ethernet 802.3az
Supports PXE

Rear Panel I/O

• 1 x PS/2 Mouse/Keyboard Port
• 1xHDMI Port
• 1xDisplayPort1.2
• 1 x Optical SPDIF Out Port
• 2 x USB 2.0 Ports (Supports ESD Protection)
• 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD Protection)
• 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD Protection)

• 4 x USB 3.2 Gen1 Ports (Supports ESD Protection)

• Ultra USB Power is supported on USB3_34 ports.

• ACPI wake-up function is not supported on USB3_34 ports.

• 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)

• HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)

Storage

• 4 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug*

• 2 x SATA3 6.0 Gb/s Connectors by ASMedia ASM1061, support NCQ, AHCI and Hot Plug

• M2_2, SATA3_3 and SATA3_4 share lanes. If either one of them is in use, the others will be disabled.

• 1 x Ultra M.2 Socket (M2_1), supports M Key type 2230/2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32 Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series APU)**

• 1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280/22110 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s) **
  If M2_1 is occupied, PCIE4 will be disabled.
  Supports NVMe SSD as boot disks
  ** Supports ASRock U.2 Kit

Connector

• 1x COM Port Header
• 1 x TPM Header
  1xPowerLEDandSpeakerHeader

• 1xRGBLEDHeader

• Supports in total up to 12V/3A, 36W LED Strip

• 1 x Addressable LED Header

• Supports in total up to 5V/3A, 15W LED Strip

• 1 x AMD Fan LED Header

• The AMD Fan LED Header supports LED strips of maximum load of 3A (36W) and length up to 2.5M.

• 1 x CPU Fan Connector (4-pin)

• The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.

• 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)

• The CPU/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.

• 3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)

• The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.

• CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP and CHA_FAN3/WP can auto detect if 3-pin or 4-pin fan is in use.

• 1 x 24 pin ATX Power Connector

• 1 × 8 pin 12V Power Connector
• 1 x Front Panel Audio Connector
• 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)
• 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)

BIOS

Feature

AMI UEFI Legal BIOS with multilingual GUI support
Supports "Plug and Play
ACPI 5.1 compliance wake up events
Supports jumperfree
SMBIOS 2.3 support
DRAM Voltage multi-adjustment

Hardware

Monitor

Temperature Sensing: CPU, MB
Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water Pump Fans
- Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, CPU/Water Pump, Chassis/Water Pump Fans
Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/ Water Pump Fans
Voltage monitoring: +12V, +5V, +3.3V , Vcore

os

• Microsoft® Windows® 10 64-bit

Certifica

tions

FCC,CE
ErP/EuP ready (ErP/EuP ready power supply is required)

• For detailed product information, please visit our website: http://www.asrock.com

Please realize that there is a certain risk involved with overclocking, including adjusting the setting in the BIOS, applying Untied Overclocking Technology, or using third-party overclocking tools. Overclocking may affect your system's stability, or even cause damage to the components and devices of your system. It should be done at your own risk and expense. We are not responsible for possible damage caused by overclocking.

Chapter 2 Installation

This is an ATX form factor motherboard. Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits into it.

Pre-installation Precautions

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

• Make sure to unplug the power cord before installing or removing the motherboard. Failure to do so may cause physical injuries to you and damages to motherboard components.
• In order to avoid damage from static electricity to the motherboard's components, NEVER place your motherboard directly on a carpet. Also remember to use a grounded wrist strap or touch a safety grounded object before you handle the components.
• Hold components by the edges and do not touch the ICs.
• Whenever you uninstall any components, place them on a grounded anti-static pad or in the bag that comes with the components.
• When placing screws to secure the motherboard to the chassis, please do not overtighten the screws! Doing so may damage the motherboard.

2.1 Installing the CPU

Unplug all power cables before installing the CPU.

1

2

3

2.2 Installing the CPU Fan and Heatsink

After you install the CPU into this motherboard, it is necessary to install a larger heatsink and cooling fan to dissipate heat. You also need to spray thermal grease between the CPU and the heatsink to improve heat dissipation. Make sure that the CPU and the heatsink are securely fastened and in good contact with each other.

Please turn off the power or remove the power cord before changing a CPU or heatsink.

Installing the CPU Box cooler SR1

1

2

3

4

Installing the AM4 Box Cooler SR2

1

2

4

*The diagrams shown here are for reference only. The headers might be in a different position on your motherboard. Please refer to page 32 for the orientation of AMD Fan LED Header (AMD_FAN_LED1).

Installing the AM4 Box Cooler SR3

1

2

3

4

5

6

Please note that this connector is the interface to the LED control board on the SR3, it requires the AMD utility "SR3 Settings Software" to control the LED.

*The diagrams shown here are for reference only. The headers might be in a different position on your motherboard. Please refer to page 29 for the orientation of USB Header.

2.3 Installing Memory Modules (DIMM)

This motherboard provides four 288-pin DDR4 (Double Data Rate 4) DIMM slots, and supports Dual Channel Memory Technology.

1. For dual channel configuration, you always need to install identical (the same brand, speed, size and chip-type) DDR4 DIMM pairs.
2. It is unable to activate Dual Channel Memory Technology with only one or three memory module installed.
3. It is not allowed to install a DDR, DDR2 or DDR3 memory module into a DDR4 slot; otherwise, this motherboard and DIMM may be damaged.
4. We suggest that you install the memory modules on DDR4_A2 and DDR4_B2 for Dual Channel Memory Technology.

AMD non-XMP Memory Frequency Support

Ryzen Series CPUs (Matisse):

UDIMM Memory Slot

A1 A2 B1 B2

Frequency

(Mhz)

• SR--3200
  -DR--3200
• SR - SR 3200
  -DR-DR3200

SR SR SR SR 2933

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2667

Ryzen Series CPUs (Pinnacle Ridge):

UDIMM Memory Slot A1 A2 B1 B2

Frequency (Mhz)

• SR - - 2933

-DR--2933

• SR - SR 2933

-DR-DR2933

SR SR SR SR 2933

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2133-2400

Ryzen Series CPUs (Picasso):

UDIMM Memory Slot		Frequency
A1 A2 B1 B2		(Mhz)

• SR--2933

-DR--2667

• SR - SR 2667

-DR-DR2400

SR SR SR SR 2133

SR/DR DR SR/DR DR 1866

SR/DR SR/DR SR/DR SR/DR 1866

Ryzen Series CPUs (Summit Ridge):

UDIMM Memory Slot		Frequency (Mhz)
A1	A2 B1 B2

• SR - - 2667
  -DR--2667
• SR - SR 2667
  -DR-DR2667

SR SR SR SR 2667

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2133-2400

Ryzen Series CPUs (Raven Ridge):

UDIMM Memory Slot		Frequency (Mhz)
A1 A2 B1 B2

• SR - - 2933
  -DR--2667
• SR - SR 2667
  -DR-DR2667

SR SR SR SR 2667

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2133-2400

SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label

DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label

The DIMM only fits in one correct orientation. It will cause permanent damage to the motherboard and the DIMM if you force the DIMM into the slot at incorrect orientation.

1

2

3

2.4 Expansion Slots (PCI Express Slots)

There are 6 PCI Express slots on the motherboard.

Before installing an expansion card, please make sure that the power supply is switched off or the power cord is unplugged. Please read the documentation of the expansion card and make necessary hardware settings for the card before you start the installation.

PCIe slots:

PCIE1 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE2 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE3 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
PCIE5 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE6 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.

• If M2_1 is occupied, PCIE4 will be disabled.

PCIe Slot Configurations

PCIE1 PCIE4

Ryzen Series CPUs (Matisse) x16 x4

Ryzen Series CPUs (Pinnacle Ridge) x16 x4

Ryzen Series CPUs (Summit Ridge) x16 x4

Ryzen Series CPUs (Picasso) x8 x4

Ryzen Series CPUs (Raven Ridge) x8 x4

Athlon series CPUs x4 x2

For a better thermal environment, please connect a chassis fan to the motherboard's chassis fan connector (CHA_FAN1/WP, CHA_FAN2/WP or CHA_FAN3/WP) when using multiple graphics cards.

2.5 Jumpers Setup

The illustration shows how jumpers are setup. When the jumper cap is placed on the pins, the jumper is "Short". If no jumper cap is placed on the pins, the jumper is "Open".

Short

Open

Clear CMOS Jumper

(CLRCMOS2)

(see p.1, No. 19)

2-pin Jumper

Short: Clear CMOS

Open: Default

CLRCMOS1 allows you to clear the data in CMOS. To clear and reset the system parameters to default setup, please turn off the computer and unplug the power cord from the power supply. After waiting for 15 seconds, use a jumper cap to short the pins on CLRCMOS1 for 5 seconds. However, please do not clear the CMOS right after you update the BIOS. If you need to clear the CMOS when you just finish updating the BIOS, you must boot up the system first, and then shut it down before you do the clear-CMOS action. Please be noted that the password, date, time, and user default profile will be cleared only if the CMOS battery is removed. Please remember to remove the jumper cap after clearing the CMOS.

2.6 Onboard Headers and Connectors

Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over these headers and connectors. Placing jumper caps over the headers and connectors will cause permanent damage to the motherboard.

System Panel Header

(9-pin PANEL1)

(see p.1, No. 15)

Connect the power switch, reset switch and system status indicator on the chassis to this header according to the pin assignments below. Note the positive and negative pins before connecting the cables.

PWRBTN (Power Switch):

Connect to the power switch on the chassis front panel. You may configure the way to turn off your system using the power switch.

RESET (Reset Switch):

Connect to the reset switch on the chassis front panel. Press the reset switch to restart the computer if the computer freezes and fails to perform a normal restart.

PLED (System Power LED):

Connect to the power status indicator on the chassis front panel. The LED is on when the system is operating. The LED keeps blinking when the system is in S3 sleep state. The LED is off when the system is in S4 sleep state or powered off (S5).

HDLED (Hard Drive Activity LED):

Connect to the hard drive activity LED on the chassis front panel. The LED is on when the hard drive is reading or writing data.

The front panel design may differ by chassis. A front panel module mainly consists of power switch, reset switch, power LED, hard drive activity LED, speaker and etc. When connecting your chassis front panel module to this header, make sure the wire assignments and the pin assignments are matched correctly.

Power LED and Speaker Header (7-pin SPK_PLED1) (see p.1, No. 16)	SPEAKER DUMMY +5V PLED+ PLED-	Please connect the chassis power LED and the chassis speaker to this header.
Serial ATA3 Connectors Right Angle: (SATA3_1: see p.1, No. 9) (SATA3_2: see p.1, No. 10) (SATA3_3: see p.1, No. 13) (SATA3_4: see p.1, No. 14) (SATA3_A1: see p.1, No. 11) (SATA3_A2: see p.1, No. 12)	SATA3_1 SATA3_2 SATA3_3 SATA3_4 SATA3_4 SATA3_5 SATA3_6 SATA3_6 SATA3_7 SATA3_8 SATA3_9 SATA3_10 SATA3_11 SATA3_12	These six SATA3 connectors support SATA data cables for internal storage devices with up to 6.0 Gb/s data transfer rate. * M2_2, SATA3_3 and SATA3_4 share lanes. If either one of them is in use, the others will be disabled.
USB 2.0 Headers (9-pin USB_1_2) (see p.1, No. 22) (9-pin USB_3_4) (see p.1, No. 21)	USB_PWR P+GND P- DUMMY USB_PWR	There are two headers on this motherboard. Each USB 2.0 header can support two ports.
USB 3.2 Gen1 Header (19-pin USB3_5_6) (see p.1 or 8, No. 8)	Vbus Vbus IntA_PB_SSRX- IntA_PB_SSRX+ GND IntA_PB_SSTX- IntA_PB_SSTX+ GND IntA_PB_D- IntA_PB_D+ Dummy	There is one header on this motherboard. Each USB 3.2 Gen1 header can support two ports.

Front Panel Audio Header (9-pin HDAUDIO1) (see p.1, No. 26)

This header is for connecting audio devices to the front audio panel.

1. High Definition Audio supports Jack Sensing, but the panel wire on the chassis must support HDA to function correctly. Please follow the instructions in our manual and chassis manual to install your system.
2. If you use an AC'97 audio panel, please install it to the front panel audio header by the steps below:

A. Connect Mic_IN (MIC) to MIC2_L.
B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L.
C. Connect Ground (GND) to Ground (GND).
D. MIC_RET and OUT_RET are for the HD audio panel only. You don't need to connect them for the AC'97 audio panel.
E. To activate the front mic, go to the "FrontMic" Tab in the Realtek Control panel and adjust "Recording Volume".

Chassis/Water Pump Fan Connectors

(4-pin CHA_FAN1/WP)

(see p.1, No. 27)

(4-pin CHA_FAN2/WP)

(see p.1, No. 18)

(4-pin CHA_FAN3/WP)

(see p.1, No. 17)

This motherboard provides three 4-Pin water cooling chassis fan connectors. If you plan to connect a 3-Pin chassis water cooler fan, please connect it to Pin 1-3.

CPU Fan Connector (4-pin CPU_FAN1) (see p.1, No.6)

This motherboard provides a 4-Pin CPU fan (Quiet Fan) connector. If you plan to connect a 3-Pin CPU fan, please connect it to Pin 1-3.

CPU/Water Pump Fan Connector (4-pin CPU_FAN2/WP) (see p.1, No. 5)	GND FAN_VOLTAGE_CONTROL FAN_SPEED FAN_SPEED_CONTROL	This motherboard provides a 4-Pin water cooling CPU fan connector. If you plan to connect a 3-Pin CPU water cooler fan, please connect it to Pin 1-3.
ATX Power Connector (24-pin ATXPWR1) (see p.1, No. 7)	12 24 1 13	This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX power supply, please plug it along Pin 1 and Pin 13.
ATX 12V Power Connector (8-pin ATX12V1) (see p.1, No. 1)	8 5 4 1	This motherboard provides a 8-pin ATX 12V power connector. To use a 4-pin ATX power supply, please plug it along Pin 1 and Pin 5.
Serial Port Header (9-pin COM1) (see p.1, No. 23)	RRXD1 DDTR#1 DDS#1 CCTS#1 RRI#1 RRTS#1 TTXD1 DDCD#1	This COM1 header supports a serial port module.
TPM Header (17-pin TPMS1) (see p.1, No. 25)	GND SMB.CLK.MAIN SMB.DATA.MAIN LAD2 LAD1 LAD0 +3V +3V3B +3V3B GND	This connector supports Trusted Platform Module (TPM) system, which can securely store keys, digital certificates, passwords, and data. A TPM system also helps enhance network security, protects digital identities, and ensures platform integrity.

AMD FAN LED Header (4-pin AMD_FAN_ LED1) (see p.1, No. 3)	1 12VGRB	AMD FAN LED Header is used to connect RGB LED extension cable that comes with AMD heatsink. The cable connection allows users to choose from various LED lighting effects. Caution: Never install the FAN LED cable in the wrong orientation; otherwise, the cable may be damaged.
RGB LED Header (4-pin RGB_LED1) (see p.1, No. 24)	1 12VGRB	This header is used to connect RGB LED extension cable which allows users to choose from various LED lighting effects. Caution: Never install the RGB LED cable in the wrong orientation; otherwise, the cable may be damaged. *Please refer to page 39 for further instructions on this header.
Addressable LED Header (3-pin ADDR_LED1) (see p.1, No. 20)	1 12GND DO_ADDR VOUT	This header is used to connect Addressable LED extension cable which allows users to choose from various LED lighting effects. Caution: Never install the Addressable LED cable in the wrong orientation; otherwise, the cable may be damaged. *Please refer to page 40 for further instructions on this header.

2.7 M.2_SSD (NGFF) Module Installation Guide (M2_1)

The M.2, also known as the Next Generation Form Factor (NGFF), is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The Ultra M.2 Socket (M2_1) supports M Key type 2230/2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32 Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series APU).

• If M2_1 is occupied, PCIE4 will be disabled.

Installing the M.2_SSD (NGFF) Module

Step 1

Prepare a M.2_SSD (NGFF) module and the screw.

Step 2

Depending on the PCB type and length of your M.2_SSD (NGFF) module, find the corresponding nut location to be used.

No.1234

Nut Location A B C D

Before installing a M.2 (NGFF) SSD module, please loosen the screws to remove the M.2 heatsink.

Step 4

Prepare the M.2 standoff that comes with the package. Then hand tighten the standoff into the desired nut location on the motherboard. Align and gently insert the M.2 (NGFF) SSD module into the M.2 slot. Please be aware that the M.2 (NGFF) SSD module only fits in one orientation.

Step 5

Tighten the screw with a screwdriver to secure the module into place. Please do not overtighten the screw as this might damage the module.

M.2_SSD (NGFF) Module Support List

Vendor Interface P/N

Intel PCIe INTEL 6000P-SSDPEKKF256G7 (nvme)

Intel PCIe INTEL 6000P-SSDPEKKF512G7 (nvme)

Intel PCIe INTEL 600P-SSDPEKKW256G7-256GB (nvme)

Kingston PCIe Kingston SHPM2280P2 / 240G (Gen2 x4)

SanDisk PCIe SanDisk-SD6PP4M-128G(Gen2 x2)

Samsung PCIe Samsung XP941-MZHPU512HCGL(Gen2x4)

For the latest updates of M.2_SSD (NFGG) module support list, please visit our website for details: http://www.asrock.com

2.8 M.2_SSD (NGFF) Module Installation Guide (M2_2)

The M.2, also known as the Next Generation Form Factor (NGFF), is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The M.2 Socket (M2_2) supports M Key type 2230/2242/2260/2280/22110 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s).

• M2_2, SATA3_3 and SATA3_4 share lanes. If either one of them is in use, the others will be disabled.

Installing the M.2_SSD (NGFF) Module

Step 1

Prepare a M.2_SSD (NGFF) module and the screw.

Step 2

Depending on the PCB type and length of your M.2_SSD (NGFF) module, find the corresponding nut location to be used.

No.12345

Nut Location A B C D E
PCB Length	3cm	4.2cm	6cm	8cm	11cm
Module Type	Type2230	Type 2242	Type2260	Type 2280	Type 22110

Step 6

Tighten the screw with a screwdriver to secure the module into place.

Please do not overtighten the screw as this might damage the module.

M.2_SSD (NGFF) Module Support List

Vendor Interface P/N

SanDisk PCIe SanDisk-SD6PP4M-128G( Gen2 x2)

Intel PCIe INTEL 6000P-SSDPEKKF256G7 (nvme)

Intel PCIe INTEL 6000P-SSDPEKKF512G7 (nvme)

KingstonPCIeKingston SHPM2280P2/240G(Gen2 x4)

Samsung PCIe Samsung XP941-MZHPU512HCGL(Gen2x4)

ADATA SATA ADATA - AXNS381E-128GM-B

Crucial SATA Crucial-CT240M500SSD4-240GB

ezlink SATA ezlink P51B-80-120GB

Intel SATA INTEL 540S-SSDSCKKW240H6-240GB

Kingston SATA Kingston SM2280S3G2/120G - Win8.1

Kingston SATA Kingston-RBU-SNS8400S3 / 180GD

LITEON SATA LITEON LJH-256V2G-256GB (2260)

PLEXTOR SATA PLEXTOR PX-128M6G-2260-128GB

PLEXTOR SATA PLEXTOR PX-128M7VG-128GB

SanDisk SATA SanDisk X400-SD8SN8U-128G

SanDisk SATA Sandisk Z400s-SD8SNAT-128G-1122

SanDisk SATA SanDisk-SD6SN1M-128G

Transcend SATA Transcend TS256GMTS800-256GB

V-Color SATA V-Color 120G

V-Color SATA V-Color 240G

WD SATA WD GREEN WDS240G1G0B-00RC30

For the latest updates of M.2_SSD (NFGG) module support list, please visit our website for details: http://www.asrock.com

2.9 ASRock Polychrome RGB

ASRock Polychrome RGB is a lighting control utility specifically designed for unique individuals with sophisticated tastes to build their own stylish colorful lighting system. Simply by connecting the LED strip, you can customize various lighting schemes and patterns, including Static, Breathing, Strobe, Cycling, Music, Wave and more.

Connecting the LED Strip

Connect your RGB LED strips to the RGB LED Header (RGB_LED1) on the motherboard.

1. Never install the RGB LED cable in the wrong orientation; otherwise, the cable may be damaged.
2. Before installing or removing your RGB LED cable, please power off your system and unplug the power cord from the power supply. Failure to do so may cause damages to motherboard components.

1. Please note that the RGB LED strips do not come with the package.
2. The RGB LED header supports standard 5050 RGB LED strip (12V/G/R/B), with a maximum power rating of 3A (12V) and length within 2 meters.

Connecting the Addressable RGB LED Strip

Connect your Addressable RGB LED strip to the Addressable LED Header (ADDR_LED1) on the motherboard.

1. Never install the RGB LED cable in the wrong orientation; otherwise, the cable may be damaged.
2. Before installing or removing your RGB LED cable, please power off your system and unplug the power cord from the power supply. Failure to do so may cause damages to motherboard components.

1. Please note that the RGB LED strips do not come with the package.
2. The RGB LED header supports WS2812B addressable RGB LED strip (5V/Data/GND), with a maximum power rating of 3A (5V) and length within 2 meters.

ASRock Polychrome RGB Utility

Now you can adjust the RGB LED color through the ASRock Polychrome RGB utility. Download this utility from the ASRock Live Update & APP Shop and start coloring your PC style your way!

1 Einleitung

(4-polig, CHA_FAN2/WP)

(siehe S.1, Nr. 18)

(4-polig, CHA_FAN3/WP)

(siehe S.1,Nr.17)

CPU-Lüfteranschluss

(4-polig, CPU_FAN1)

(siehe S.1,Nr.6)

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€4120000000000000000000000000000000000000000000000000000000000000000000000000000000000

ATX電源コネケ夕

(24) ATXPWR1

(p.1、No.7参照)

246

If you need to contact ASRock or want to know more about ASRock, you're welcome to visit ASRock's website at http://www.asrock.com; or you may contact your dealer for further information. For technical questions, please submit a support request form at https://event.asrock.com/tsd.asp

ASRock Incorporation

2F., No.37, Sec. 2, Jhongyang S. Rd., Beitou District,

Taipei City 112, Taiwan (R.O.C.)

ASRock EUROPE B.V.

Bijsterhuizen 11-11

6546 AR Nijmegen

The Netherlands

Phone: [phone]

Fax: [phone]

ASRock America, Inc.

13848 Magnolia Ave, Chino, CA91710

U.S.A.

Phone: [phone]

Fax: [phone]

DECLARATION OF CONFORMITY

Per FCC Part 2 Section 2.1077(a)

Responsible Party Name: ASRock Incorporation

Address: 13848 Magnolia Ave, Chino, CA91710

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

hereby declares that the product

Product Name : Motherboard

Model Number: B450 Steel Legend

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: James

Signature :

Date: May 12, 2017

EU Declaration of Conformity

ASRock

For the following equipment:

Motherboard

(Product Name)

B450 Steel Legend / ASRock

(Model Designation / Trade Name)

ASRock Incorporation

(Manufacturer Name)

2F., No.37, Sec. 2, Zhongyang S. Rd., Beitou District, Taipei City 112, Taiwan (R.O.C.)

(Manufacturer Address)

EMC -Directive 2014/30/EU (from April 20th, 2016)

EN 55022:2010/AC:2011 Class B

EN55024:2010/A1:2015

EN55032:2012+AC:2013ClassB

EN61000-3-3:2013

EN61000-3-2:2014

□LVD—Directive 2014/35/EU (from April 20th, 2016)

EN60950-1:2011+A2:2013

EN 60950-1:2006/A12:2011

RoHS - Directive 2011/65/EU

CE marking

(EU conformity marking)

C E

ASRock EUROPE B.V.

(Company Name)

Bijsterhuizen 1111 6546 AR Nijmegen The Netherlands

(Company Address)

Person responsible for making this declaration:

(Name, Surname)

A.V.P

(Position / Title)

February 8, 2019

(Date)

P/N: 15G062148002AK V1.1