PRO B850M-B GEN4 - Motherboard MSI - Free user manual and instructions

Product Type	Motherboard
Brand	MSI
Model	PRO B850M-B GEN4
Socket	AMD AM5
Chipset	AMD B850
Form Factor	Micro-ATX (244mm x 244mm)
Memory Support	4 DIMM slots, up to 128GB DDR5, dual-channel
Expansion Slots	1 x PCIe 4.0 x16, 1 x PCIe 3.0 x1
Storage Interfaces	2 x M.2 (PCIe 4.0), 4 x SATA 6Gb/s
USB Ports	2 x USB 3.2 Gen 2, 6 x USB 2.0, 1 x USB Type-C
LAN	Realtek 2.5Gbps Ethernet
Audio	7.1-channel HD audio with optical S/PDIF
Graphics Outputs	HDMI 2.1, DisplayPort 1.4
Power Connectors	24-pin ATX, 8-pin EPS
BIOS	AMI UEFI with MSI Click BIOS 5
Cooling	VRM heatsinks, M.2 Shield Frozr
Included Accessories	2 x SATA cables, I/O shield, manual
Warranty	3-year limited warranty

Frequently Asked Questions - PRO B850M-B GEN4 MSI

What CPU is compatible with the MSI PRO B850M-B GEN4?

This motherboard uses the AMD AM5 socket, supporting AMD Ryzen 7000, 8000, and 9000 series processors. Ensure your CPU is listed in the MSI compatibility chart before installation.

How many RAM sticks can I install on this motherboard?

You can install up to 4 DDR5 memory modules, with a maximum capacity of 128GB. For best dual-channel performance, populate the A2 and B2 slots first.

Can I use PCIe 5.0 SSDs with this board?

No, the M.2 slots on this board support PCIe 4.0. They are backward compatible with PCIe 3.0 and 2.0 SSDs, but not with PCIe 5.0 drives.

Does the motherboard support integrated graphics?

Yes, if your AMD CPU has integrated Radeon graphics, you can use the HDMI 2.1 or DisplayPort 1.4 outputs for video output.

How do I update the BIOS on this motherboard?

Use MSI Center or the BIOS flash function. For a safe update, download the latest BIOS from the MSI website, place it on a USB drive, and use the M-FLASH utility in BIOS setup.

What is the maximum number of storage devices I can connect?

You can connect up to 6 storage devices: 2 M.2 SSDs and 4 SATA drives. Note that using M.2 slots may disable some SATA ports depending on configuration.

Does the board have Wi-Fi built-in?

No, the PRO B850M-B GEN4 does not include wireless networking. It has a 2.5Gbps Ethernet port; you can add a Wi-Fi card via the PCIe x1 slot if needed.

Why does my motherboard not power on after installation?

Check the 24-pin ATX and 8-pin EPS power cables are fully seated, and the RAM sticks are properly inserted. Also verify your PSU is switched on and the front panel power connectors are on the correct pins.

Can I use this motherboard in a small form factor case?

The micro-ATX form factor (244mm x 244mm) fits most compact cases. Always check your case's motherboard support before installation to ensure compatibility.

How do I clean and maintain the motherboard?

Use a can of compressed air to dust off components, and a soft, slightly damp cloth for surfaces. Avoid liquids near the board and disconnect power before cleaning.

USER MANUAL PRO B850M-B GEN4 MSI

Specifications....17

Special Features....21

Package Contents 22

Back Panel Connectors ....23

LAN Port LED Status Table 24

Audio Jacks Connection.... 24

Overview of Components ....26

CPU Socket....27

DDR5 DIMM Slots.... 29

PCI_E1\~2: PCIe Expansion Slots.... 31

M2_1\~2: M.2 Slots (Key M) 32

SATA_1\~4: SATA 6Gb/s Connectors....36

JAUD1: Front Audio Connector 36

JFP1, JFP2: Front Panel Connectors 37

CPU_PWR1, ATX_PWR1: Power Connectors 38

JCI1: Chassis Intrusion Connector 39

JUSBC1: USB 10Gbps Type-C Front Panel Connectors 40

JUSB3: USB 5Gbps Connector....40

JUSB1\~2: USB 2.0 Connectors 41

JTPM1: TPM Module Connector 41

JOC_FS1: Safe Boot Jumper 42

JBAT1: Clear CMOS (Reset BIOS) Jumper 42

CPU_FAN1, PUMP_SYS1, SYS_FAN1\~3: Fan Connectors 43

JRGB1: RGB LED connector 44

JARGB_V2_1\~3: A-RAINBOW V2 (ARGB Gen2) LED connectors 45

Onboard LEDs....47

EZ Debug LED 47

EZ Memory Detection LED 47

Installing OS, Drivers & MSI Center 48

Installing Drivers with MSI Driver Utility Installer.... 49

UEFI BIOS....52

BIOS Setup 53

Entering BIOS Setup 54

Resetting BIOS 55

Updating BIOS 55

Quick Start

This Quick Start provides clear diagrams to help you install the motherboard. Video demonstrations are also available for some installations. Visit these videos by clicking the provided URL on your phone or tablet’s web browser. Alternatively, you can scan the QR code to access the video directly.

Preparing Tools and Components

Safety Information

- The components included in this package are prone to damage from electrostatic discharge (ESD). Please adhere to the following instructions to ensure successful computer assembly.

- Ensure that all components are securely connected. Loose connections may cause the computer to not recognize a component or fail to start.

- Hold the motherboard by the edges to avoid touching sensitive components.

- It is recommended to wear an electrostatic discharge (ESD) wrist strap when handling the motherboard to prevent electrostatic damage. If an ESD wrist strap is not available, discharge yourself of static electricity by touching another metal object before handling the motherboard.

- Store the motherboard in an electrostatic shielding container or on an anti-static pad whenever the motherboard is not installed.

- Before turning on the computer, ensure that there are no loose screws or metal components on the motherboard or anywhere within the computer case.

- Do not boot the computer before installation is completed. This could cause permanent damage to the components as well as injury to the user.

- If you need help during any installation step, please consult a certified computer technician.

- Always turn off the power supply and unplug the power cord from the power outlet before installing or removing any computer component.

- Keep this user guide for future reference.

- Keep this motherboard away from humidity.

- Make sure that your electrical outlet provides the same voltage as is indicated on the PSU, before connecting the PSU to the electrical outlet.

- Place the power cord such a way that people can not step on it. Do not place anything over the power cord.

- All cautions and warnings on the motherboard should be noted.

- If any of the following situations arises, get the motherboard checked by service personnel:

- Liquid has penetrated into the computer.

- The motherboard has been exposed to moisture.

- The motherboard does not work well or you can not get it work according to user guide.

- The motherboard has been dropped and damaged.

- The motherboard has obvious sign of breakage.

- Do not leave this motherboard in an environment above 60° C ( 140° F), it may damage the motherboard.

Case stand-off notification

To prevent damage to the motherboard, any unnecessary mounting stand-off between the motherboard circuits and the computer case is prohibited. The Case standoff keep out zone signs will be marked on the backside of motherboard (as shown below) to serve as a warning to user.

Avoid collision notification

Protective paint is printed around each screw hole to prevent parts from being scratched.

* The illustration above is for reference only and may vary from the motherboard you purchased.

Installing a Processor

- https://msi.gm/SDBE5855

If you are installing the screw-type CPU heatsink, please follow the figure below to remove the retention module first and then install the heatsink.

Installing DDR5 memory

- https://msi.gm/S647FF99

Connecting the Front Panel Header

- https://msi.gm/S8EF7577

Installing the Motherboard

- https://msi.gm/S4BA9046

Connecting the Power Connectors

- https://msi.gm/SD937E2C

Installing SATA Drives

- https://msi.gm/S9369131

Installing a Graphics Card

- https://msi.gm/SBC41FF1

Connecting Peripheral Devices

Power On

Specifications

CPU	Supports AMD RyzenTM 9000/ 8000/ 7000 Series Desktop Processors*Processor socket AM5* Please go to www.msi.com to get the newest support status as new processors are released.
Chipset	AMD B850 Chipset
Memory	2x DDR5 memory slots*, supporting up to 128GB**Supports AMD POR Speed and JEDEC SpeedSupports Memory Overclocking and AMD EXPOTMSupports Dual-Channel modeSupports Non-ECC, Un-buffered memorySupports CUDIMM, Clock Driver bypass mode only***The DIMM slots on this motherboard only have single-sided latches.** Memory compatibility and supported speeds can vary depending on the CPU and memory configuration. For detailed information, please refer to the Memory Compatibility List available on the product's Support page or visit https://www.msi.com/support/.*** CUDIMM support and POR boot frequency may vary by CPU series, with manual overclocking available after boot. Certain CPUs may fail to boot, but future BIOS updates will improve compatibility.
Expansion Slots	1x PCIe x16 slotPCI_E2 slot (From CPU)Supports PCIe 4.0 x16 (For RyzenTM 9000/ 7000 Series processors)Supports PCIe 4.0 x8 (For RyzenTM 8700/ 8600/ 8400 Series processors)Supports PCIe 4.0x4 (For RyzenTM 8500/ 8300 Series processors)1x PCIe x1 slotPCI_E1 slot (From B850 chipset)Supports up to PCIe 3.0 x1
Onboard Graphics	1x HDMITM 2.1 port, supporting a maximum resolution of 4K 60Hz*/ **1x DisplayPort 1.4, supporting a maximum resolution of 4K 60Hz*/ *** Available only on processors featuring integrated graphics.** Graphics specifications may vary depending on the CPU installed.
SATA Ports	4x SATA 6Gb/s ports (From B850 chipset)

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M.2 SSD Slots	• 2x M.2 slots (Key M)• M2_1 slot (From CPU)• Supports up to PCIe 5.0 x4 (For RyzenTM 9000/ 7000 Series processors)• Supports up to PCIe 4.0 x4 (For RyzenTM 8000 Series processors)• Supports 2280 storage devices• M2_2 slot (From CPU)• Supports up to PCIe 4.0 x4 (For RyzenTM 9000/ 8700/ 8600/ 8400/ 7000 Series processors)• Supports up to PCIe 4.0 x2 (For RyzenTM 8500/ 8300 Series processors)• Supports 2280 storage devices
RAID	• Supports RAID 0 and RAID 1 for M.2 NVMe storage devices• Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices
Audio	• Realtek® ALC897 Codec• 7.1-Channel High Definition Audio
LAN	• 1x Realtek® 8125 2.5Gbps LAN controller
Power Connectors	• 1x 24-pin ATX main power connector• 1x 8-pin +12V power connector
Internal USB Connectors	• 1x USB 10Gbps Type-C front panel port (From B850 chipset)• 1x USB 5Gbps connector (From B850 chipset)• Supports additional 2 USB 5Gbps ports• 2x USB 2.0 connectors (From B850 chipset)• Supports additional 4 USB 2.0 ports
Fan Connectors	• 1x 4-pin CPU fan connector• 1x 4-pin water-pump/ system fan connector• 3x 4-pin system fan connectors

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System Connectors	1x Front panel audio connector2x System panel connectors1x Chassis Intrusion connector1x TPM module connector1x Tuning Controller connector
Jumpers	1x Clear CMOS jumper1x OC safe boot jumper
LED Features	1x 4-pin RGB LED connector3x 3-pin A-RAINBOW V2 (ARGB Gen2) LED connectors4x EZ Debug LED1x EZ Memory Detection LED
Back Panel Connectors & Others	1x DisplayPort1x HDMITM port1x Clear CMOS Button1x Flash BIOS Button1x USB 5Gbps Type-C port (From CPU)3x USB 5Gbps Type A ports (From ASM1074)2x USB 2.0 connectors (From CPU)1x 2.5G LAN (RJ45) port3x audio jacks
I/O Controller	NUVOTON NCT6687-R Controller Chip
Hardware Monitor	CPU/ System/ Chipset temperature detectionCPU/ System/ Pump fan speed detectionCPU/ System/ Pump fan speed control
Form Factor	Micro-ATX Form Factor9.6 in. x 8.9 in. (244 mm x 226 mm)
BIOS Features	1x 512 Mb flashUEFI AMI BIOSACPI 6.5, SMBIOS 3.7Multi-language

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Software

DriversMSI CenterAcrobatAdobe Creative CloudAIDA64 Extreme - MSI EditionCPU-Z MSI GAMINGDropboxNorton 360

Special Features

MSI Center

• MSI AI Engine
• Cooling Wizard
• Mystic Light
• Ambient Link
• Frozr AI Cooling
• Hardware Monitoring
  • Live Update
• MSI Companion
• System Diagnosis
• True Color
• User Scenario
• AI LAN Manager

EZ DIY

• EZ M.2 Clip II
• Flash BIOS Button
• Clear CMOS Button
  • Pre-installed I/O Shield
• EZ DEBUG LED
  • EZ Meomory Detection LED
• EZ LED Control

Thermal Features

• Extended Heatsink Design
• M.2 Shield Frozr
- K7 MOSFET thermal pad / K5 Extra choke pad
- Fan headers (CPU + Combo + SYSTEM)

Performance

• Core Boost
  • VRM Power Design (VCore/ SOC/MISC)
• Memory Boost
  • Lightning Gen 5 M.2 Slot
  • Lightning Gen 4 PCI-E/ M.2 Slot
• Front USB Type-C
• Server Grade PCB
  • 2oz Copper thickened PCB

Audio

- Audio Boost

RGB Support

• Mystic Light
  • Mystic Light Extension (RGB)
  • Mystic Light Extension (ARGB V2)
• Ambient Devices Support

BIOS

• Click BIOS X
• AI Boost
  • Performance Preset

Package Contents

Please check the contents of your motherboard package. It should contain:

Board

- 1x Motherboard

Documentation

• 1x Quick installation guide
• 1x European Union Regulatory Notices

Cables

- 1x SATA cable

Accessories

• 1x EZ M.2 Clip II Remover

If any of the above items are damaged or missing, please contact your retailer.

Back Panel Connectors

Item Description
1 DisplayPort
2	HDMITM port HIGH-DEFINITION MULTIMEDIA INTERFACE
3	Clear CMOS button - Power off your computer. Press and hold the Clear CMOS button for about 5-10 seconds to reset BIOS to default values.
4 USB 5Gbps Type-A port (From ASM1074)
5 USB 5Gbps Type-A ports (From ASM1074)
6 2.5 Gbps LAN(RJ45) port
7 Line-in port
8 Line-out port
9 Mic-in port
10 USB 2.0 Type-A port (From CPU)
11	USB 2.0 Type-A port (From CPU)• Flash BIOS port
12 USB 5Gbps Type-C port (From CPU)
13	Flash BIOS button - Please refer to page 56 for details about updating BIOS with Flash BIOS button.

LAN Port LED Status Table

Link/ Activity LED Speed LED
Status Description Status Speed
Off No link Off 10Mbps
Yellow blinking slowly Linked Green 100Mbps/ 1Gbps
Yellow blinking rapidly Data activity Orange 2.5Gbps

Audio Jacks Connection

Audio jacks to headphone and microphone diagram

Audio jacks to stereo speakers diagram

Audio jacks to 4-channel speakers diagram

Audio jacks to 5.1-channel speakers diagram

Audio jacks to 7.1-channel speakers diagram

Overview of Components

CPU Socket

The AM5 socket is a modern CPU socket designed for AMD processors. It is a key component in contemporary computing systems, providing the foundation for powerful and efficient CPUs.

Installing the CPU to the AM5 socket

The surface of the AM5 CPU has two notches and a golden triangle to assist in correctly lining up the CPU for motherboard placement. The golden triangle is the Pin 1 indicator.

To install the CPU, align the two notches on the AM5 socket with the two corresponding notches on the CPU. Please ensure that the gold triangle on the CPU serves as the PIN 1 indicator during the installation process.

Distance from the center of the CPU socket to the nearest DIMM slot.

Important

• When changing the processor, the system configuration could be cleared and reset BIOS to default values, due to the AM5 processor's architecture.
• Please ensure that the motherboard and power supply are turned off and always disconnect the power cord from the power outlet before installing or removing the CPU.
• Please retain the CPU protective cap after installing the processor. MSI will deal with Return Merchandise Authorization (RMA) requests if only the motherboard comes with the protective cap on the CPU socket.
• Whenever the CPU is not installed, always protect the CPU socket pins by covering the socket with the protective cap.
• The CPU should only fit in one orientation, so do not force it. Gently place the CPU into the socket without applying excessive pressure.
• Please handle the CPU by the edges only; avoid touching the pins or the surface of the CPU. Any damage to the pins can result in a malfunctioning CPU.
• When installing a CPU, always remember to install a CPU heatsink. A CPU heatsink is necessary to prevent overheating and maintain system stability.
• Please install the CPU cooler according to the manufacturer's instructions. Make sure it is securely a tight seal with the CPU and attached to the motherboard to ensure proper heat dissipation.
  • Overheating can seriously damage the CPU and motherboard. Always make sure the cooling fans work properly to protect the CPU from overheating. Be sure to apply an even layer of thermal paste (or thermal tape) between the CPU and the heatsink to enhance heat dissipation.
• This motherboard is designed to support overclocking. Before attempting to overclock, please make sure that all other system components can tolerate overclocking. Any attempt to operate beyond product specifications is not recommended. MSI® does not guarantee the damages or risks caused by inadequate operation beyond product specifications.

DDR5 DIMM Slots

The DDR5 DIMM slot is a dedicated connector designed to accommodate DDR5 (Double Data Rate 5) memory modules. It represents the latest standard in computer memory, providing enhanced data transfer speeds and efficiency.

Memory module installation recommendation

Always insert memory modules in the DIMMB2 slot first.

Important

- The DIMM slots on this motherboard only have a single latch. Please be careful when installing or removing memory modules to avoid damaging the slots.

- Align the notch on the DDR5 module with the notch on the memory slot to ensure proper orientation. Do not force the module into the slot; it should slide in easily if properly aligned.

- To ensure system stability for Dual channel mode, memory modules must be of the same type, number and density.

- Some memory modules may operate at a lower frequency than the marked value when overclocking due to the memory frequency operates dependent on its Serial Presence Detect (SPD). Go to BIOS and find the DRAM Speed to set the memory frequency if you want to operate the memory at the marked or at a higher frequency.

- It is recommended to use a more efficient memory cooling system for full DIMMs installation or overclocking.

- The stability and compatibility of installed memory module depend on installed CPU and devices when overclocking.

- Please refer to www.msi.com for more information on compatible memory.

PCI_E1\~2: PCIe Expansion Slots

PCI Express (PCIe) expansion slots are used to connect add-on cards to the motherboard. These cards can provide additional functionality to your computer, such as graphics, networking, or storage.

Important

• If you install a large and heavy graphics card, you need to use a tool such as MSI Graphics Card Bolster to support its weight to prevent deformation of the slot.
• When adding or removing expansion cards, always turn off the power supply and unplug the power supply power cable from the power outlet. Read the expansion card’s documentation to check for any necessary additional hardware or software changes.

M2_1\~2: M.2 Slots (Key M)

The M.2 slot is a small, high-speed expansion slot on a motherboard. It can be used to connect an M.2 SSD, which is a type of solid-state drive that offers faster performance than traditional SATA SSDs.

Watch the video to learn how to Install M.2 SSD with EZ M.2 Clip II.

- https://msi.gm/SED18DE2

If your M.2 SSD equips its own heatsink, please note the following:

• Remove the M.2 plate or rubber cube in the M.2 slot before installing M.2 SSD. Do not re-install the heatsink supplied with the motherboard.
• Ensure that the M.2 SSD heatsink you use fits the size limits to prevent damage.

M.2 SSD Heatsink Size Restrictions

If you need to purchase an additional heatsink, please refer to the diagram below to confirm the M.2 installation space dimensions. Please also consider the height of the installed PCIe expansion card when determining M.2 installation space.

Installing M.2 module into M2_1 slot

1. Loosen the screws of M.2 Shield Frozr heatsink.
2. Lift up the M.2 Shield Frozr heatsink and remove it.

1. Insert your M.2 SSD into the M.2 slot at a 30-degree angle.
2. Rotate the EZ M.2 Clip to secure the M.2 SSD, or use the EZ M.2 Clip II, which automatically locks and secures the SSD.

1. Remove the protective film from the thermal pad under the M.2 Shield Frozr heatsink.
2. Put the M.2 Shield Frozr heatsink back in place and secure it.

Installing M.2 module into M2_2 slot

1. Insert your M.2 SSD into the M.2 slot at a 30-degree angle.

2. Use the EZ M.2 Clip II, which automatically locks and secures the SSD.

Removing M.2 SSD using the EZ M.2 Clip II

To remove M.2 SSD from the EZ M.2 Clip II, gently push the spring head on the top of the EZ M.2 Clip II outward while simultaneously pulling the M.2 SSD out.

SATA_1\~4: SATA 6Gb/s Connectors

These connectors are SATA 6Gb/s interface ports. Each connector can connect to one SATA device.

Important

• Please do not fold the SATA cable at a 90-degree angle. Data loss may result during transmission otherwise.
• SATA cables have identical plugs on either sides of the cable. However, it is recommended that the flat connector be connected to the motherboard for space saving purposes.

JAUD1: Front Audio Connector

This connector allows you to connect audio jacks on the front panel.

Pin Signal Name Pin Signal Name
1 MIC L 2 Ground
3 MIC R 4 NC
5 Head Phone R 6 MIC Detection
7 SENSE_SEND 8			No Pin
9	Head Phone L	10	Head Phone Detection

JFP1, JFP2: Front Panel Connectors

The JFP1 connector controls the power on, power reset, and the LEDs on your PC case/chassis. Power Switch/ Reset Switch headers allow you to connect power button/ reset button. Power LED header connects to LED light on the PC case, and HDD LED header indicates the activity of the hard disk. The JFP2 connector is for Buzzer and Speaker. For connecting the cables from your PC case to the correct pins on the motherboard, please refer to the following images.

Make sure to connect the Power LED and HDD LED cables to the corresponding positive and negative pins on the motherboard. Otherwise, the LEDs will not function properly.

CPU_PWR1, ATX_PWR1: Power Connectors

These power connectors allow you to connect an ATX power supply.

CPU_PWR1

Pin Signal Name Pin Signal Name
1 Ground 2 Ground
3 Ground 4 Ground
5 +12V 6 +12V
7 +12V 8 +12V

ATX_PWR1

Pin Signal Name Pin Signal Name
1 +3	3V 2 +3.3V
3 Ground 4 +5V
5 Ground 6 +5V
7 Ground 8 PWR OK
9 5VSB 10 +12V
11 +12V 12 +3.3V
13 +3.3V	14 -12V
15	Ground	16	PS-ON#
17	Ground	18	Ground
19	Ground	20 Res
21 +5V 22 +5V
23 +5V 24	Ground

Make sure that all the power cables are securely connected to a proper ATX power supply to ensure stable operation of the motherboard.

JCI1: Chassis Intrusion Connector

This connector allows you to connect the chassis intrusion switch cable.

Normal (default)

Trigger the chassis intrusion event

Using chassis intrusion detector

1. Connect the JCI1 connector to the chassis intrusion switch/ sensor on the chassis.
2. Close the chassis cover.
3. Go to BIOS > Security > Chassis Intrusion Configuration.
4. Set Chassis Intrusion to Enabled.
5. Press F10 to save and exit and then press the Enter key to select Yes.
6. Once the chassis cover is opened again, a warning message will be displayed on screen when the computer is turned on.

Resetting the chassis intrusion warning

1. Go to BIOS > Security > Chassis Intrusion Configuration.
2. Set Chassis Intrusion to Reset.
3. Press F10 to save and exit and then press the Enter key to select Yes.

JUSBC1: USB 10Gbps Type-C Front Panel Connectors

This USB connector allows you to connect to the USB Type-C® port on the front panel and supports data transfer speeds of up to 10Gbps. It features a user-friendly design that ensures proper orientation when connecting the cable.

JUSB3: USB 5Gbps Connector

This USB connector allows you to connect to USB ports on the chassis panel and supports data transfer speeds of up to 5Gbps.

Pin Signal Name Pin Signal Name
1 Power 2 USB3_RX_DN
3 USB3_RX_DP 4 Ground
5 USB3_TX_C_DN 6 USB3_TX_C_DP
7 Ground 8 USB2.0-
9 USB2.0+ 10 Ground
11 USB2.0+ 12 USB2.0-
13 Ground 14 USB3_TX_C_DP
15	USB3_TX_C_DN	16 Ground
17	USB3_RX_DP	18	USB3_RX_DN
19 Power 20 No Pin

Note that the Power and Ground pins must be connected correctly to avoid possible damage.

JUSB1\~2: USB 2.0 Connectors

These USB connectors allow you to connect to USB ports on the chassis panel and supports data transfer speeds of up to 480Mbps.

Pin Signal Name Pin Signal Name
1 VCC 2 VCC
3 USB0- 4 USB1-
5 USB0+ 6 USB1+
7 Ground 8 Ground
9 No Pin 10 NC

• Note that the VCC and Ground pins must be connected correctly to avoid possible damage.
• In order to recharge your iPad, iPhone and iPod through USB ports, please install MSI Center utility.

JTPM1: TPM Module Connector

This connector is designed for a Trusted Platform Module (TPM) to enable secure storage of sensitive data and perform cryptographic operations that ensure the integrity of your system.

Pin Signal Name Pin Signal Name
1	SPI Power	2 SPI Chip Select
3	Master In Slave Out (SPI Data)	4	Master Out Slave In (SPI Data)
5	Reserved	6	SPI Clock
7 Ground 8	SPI Reset
9	Reserved	10 No Pin
11	Reserved	12	Interrupt Request

The TPM module is not included and must be purchased separately.

JOC_FS1: Safe Boot Jumper

This jumper is used for Safe Boot. When this jumper is enabled, the system will boot with default settings and lower PCIe (from CPU) mode.

Normal (default) Boot with the saved BIOS settings.

Enabled Apply the BIOS default settings and lower PCIe (from CPU) mode for Safe Boot

JBAT1: Clear CMOS (Reset BIOS) Jumper

There is CMOS memory onboard that is external powered from a battery located on the motherboard to save system configuration data. If you want to clear the system configuration, set the jumpers to clear the CMOS memory.

Keep Data (default)

Clear CMOS/Reset BIOS

Resetting BIOS to default values

1. Power off the computer and unplug the power cord.
2. Use a jumper cap to short JBAT1 for about 5-10 seconds.
3. Remove the jumper cap from JBAT1.
4. Plug the power cord and Power on the computer.

CPU_FAN1, PUMP_SYS1, SYS_FAN1\~3: Fan Connectors

Fan connectors can be divided into two categories: PWM Mode and DC Mode. PWM Mode fan connectors provide a constant 12V output and adjust fan speed with a speed control signal. DC Mode fan connectors control fan speed by changing voltage. Please refer to the following specification table for the fan connector mode of your motherboard.

You can control fans in BIOS> HARDWARE MONITOR panel. Enabling Smart Fan Mode will regulate fan speed based on CPU or system temperature. Disabling Smart Fan Mode will set the fan to full speed.

You can set DC or PWM in HARDWARE MONITOR panel to your fan type if your motherboard supports it. Make sure fans are working properly after switching the PWM/ DC mode.

PWM Mode pin definition

Pin Signal Name Pin Signal Name
1 Ground 2 +12V
3 Sense 4 Speed Control		Signal

DC Mode pin definition

Pin Signal Name Pin Signal Name
1 Ground 2 Voltage Control
3 Sense 4 NC

Fan specifications for fan connectors

Connector Fan mode Max. current Max. power
CPU_FAN1	Auto mode	2A	24W
PUMP_SYS1	PWM mode	3A	36W
SYS_FAN1~3	Auto mode	1A	12W

The auto mode fan connectors can automatically detect PWM and DC modes.

JRGB1: RGB LED connector

The JRGB connector allows you to connect the 5050 RGB LED strips 12V.

Pin Signal Name Pin Signal Name
1+12V 2 G
3 R 4 B

RGB LED Strip Connection

RGB LED Fan Connection

Important

• The JRGB connector supports up to 2 meters continuous 5050 RGB LED strips (12V/G/R/B) with the maximum power rating of 3A (12V).
  • Always turn off the power supply and unplug the power cord from the power outlet before installing or removing the RGB LED strip.
• Please use MSI's software to control the extended LED strip.

JARGB_V2_1\~3: A-RAINBOW V2 (ARGB Gen2) LED connectors

The JARGB_V2 connectors allow you to connect the ARGB Gen2 and the ARGB-based LED strips. The JARGB_V2 connector supports up to 240 individually addressable RGB LEDs with maximum power rating of 3A (5V).

Pin Signal Name Pin Signal Name
1 +5V 2 Data
3 No	Pin 4 Ground

Addressable RGB LED Strip Connection

Addressable RGB LED Fan Connection

Do not connect the wrong type of LED strips. The JRGB connector and the JARGB_V2 connector provide different voltages, and connecting the ARGB 5V LED strip to the JRGB connector will result in damage to the LED strip.

• If you connect the ARGB Gen1 and ARGB Gen2 LED strips into the same connector, it may cause some issues. Please do not mix the ARGB Gen1 LED and the ARGB Gen2 LED strips together.
• It is recommended that you install LED strips with the same specification to achieve the best effects.
  • Always turn off the power supply and unplug the power cord from the power outlet before installing or removing the addressable RGB LED strip.
• Please use MSI's software to control the extended LED strip.

Onboard LEDs

EZ Debug LED

These LEDs indicate the debug status of the motherboard.

LED Color Status
Red ■	CPU is not detected or fail
Yellow □	DRAM is not detected or fail
White □	GPU is not detected or fail
Green ■	Booting device is not detected or fail

EZ Memory Detection LED

This LED indicates that the memory module's power is not detected. If any memory module loses power, this LED will light up.

Installing OS, Drivers & MSI Center

Please download and update the latest utilities and drivers at www.msi.com

Installing Windows 11

1. Power on the computer.
2. Insert the Windows 11 installation disc/USB into your computer.
3. Press the Restart button on the computer case.
4. Press F11 key during the computer POST (Power-On Self Test) to get into Boot Menu.
5. Select the Windows 11 installation disc/USB from the Boot Menu.
6. Press any key if screen shows Press any key to boot from CD or DVD... message. If not, please skip this step.
7. Follow the instructions on the screen to install Windows 11.

Installing Drivers with MSI Driver Utility Installer

• Some new network chips have not been natively supported by Windows 11. It is recommended that the LAN driver be installed before installing drivers with MSI Driver Utility Installer. Please refer to www.msi.com to install the LAN driver for your motherboard.

• The MSI Driver Utility Installer will only pop up once. If you cancel or close it during the process, please refer to the Live Update chapter of the MSI Center manual to install the drivers. You can also go to www.msi.com to search your motherboard and download the drivers.
  • MSI Driver Utility Installer needs to be installed over the internet.

• Start up your computer in Windows 11.

• Select Start > Settings > Windows Update, and then select Check for updates.
• MSI Driver Utility Installer will pop up automatically.

1. Select the I have read and agree to the MSI Terms of Use check box, and then click Next.

1. Check the Select All checkbox in the lower-left corner and click Install to install MSI Center and drivers. The installation progress will be shown at the bottom.

1. Once the progress has completed, click Finish.

MSI Center

MSI Center is an application that helps you easily optimize game settings and smoothly use content creation softwares. It also allows you to control and synchronize LED light effects on PCs and other MSI products. With MSI Center, you can customize ideal modes, monitor system performance, and adjust fan speed.

MSI Center User Guide

If you would like to know more information about MSI Center, please refer to https://msi.gm/S391169E

or scan the QR code to access.

Functions may vary depending on the product you have.

UEFI BIOS

MSI UEFI BIOS is compatible with UEFI (Unified Extensible Firmware Interface) architecture. UEFI has many new functions and advantages that traditional BIOS cannot achieve, and it will completely replace BIOS in the future. The MSI UEFI BIOS uses UEFI as the default boot mode to take full advantage of the new chipset's capabilities. However, it still has a CSM (Compatibility Support Module) mode to be compatible with older devices. That allows you to replace legacy devices with UEFI compatible devices during the transition.

The term BIOS in this user guide refers to UEFI unless otherwise noted.

UEFI advantages

• Fast booting - UEFI can directly boot the operating system and save the BIOS self-test process. And also eliminates the time to switch to CSM mode during POST.
  • Supports for hard drive partitions larger than 2 TB.
  • Supports more than 4 primary partitions with a GUID Partition Table (GPT).
  • Supports unlimited number of partitions.
• Supports full capabilities of new devices - new devices may not provide backward compatibility.
• Supports secure startup - UEFI can check the validity of the operating system to ensure that no malware tampers with the startup process.

Incompatible UEFI cases

• 32-bit Windows operating system - this motherboard supports only Windows 11 64-bit operating system.
• Older graphics card - the system will detect your graphics card. If you use older graphics cards, it may display a warning message There is no GOP (Graphics Output protocol) support detected in this graphics card.

We recommend that you replace it with a graphics card supporting GOP/UEFI or use CPU with integrated graphics for having normal function.

BIOS Setup

The default settings offer the optimal performance for system stability in normal conditions. You should always keep the default settings to avoid possible system damage or failure booting unless you are familiar with BIOS.

• It is not recommended to update BIOS when system has no issue.
• BIOS items are continuously updated for better system performance. Therefore, the description may be slightly different from the latest BIOS and should be for reference only. You could also refer to the HELP information panel in BIOS.
• The BIOS screens, options and settings will vary depending on the products you have.

BIOS User Guide

If you’d like to know more instructions on setting up the BIOS, please refer to https://msi.gm/S53FE767

or scan the QR code to access.

The appearance of the BIOS user guide may differ based on your motherboard model. Please consult your motherboard's BIOS for specific settings and options.

Entering BIOS Setup

Press Delete key, when the Press DEL key to enter Setup Menu, F11 to enter Boot Menu message appears on the screen during the boot process.

Function key

+/-: Increase / decrease the value

Enter: Select the item

ESC: Exit

Tab: Next selection

Ctrl+F: Enter Search menu

F1: General Help list
F2: Add/ Remove a favorite item
F3: Enter Favorites menu
F4: Enter CPU core center & memory center information menu
F5: Enter Hardware Monitor menu
F6: Load optimized defaults
F7: Switch between Advanced mode and EZ mode
F8: Load Overclocking Profile
F9: Save Overclocking Profile
F10: Save Change and Reset*
F12: Take a screenshot and save it to USB flash drive (FAT/ FAT32 format only).

* Pressing F10 displays a confirmation message summarizing your changes. Select Yes or No to confirm.

How to find the BIOS version?

After entering the BIOS, find the BIOS version in the information box.

Resetting BIOS

If you encounter certain issues with your computer, restoring the default BIOS settings might help. You can reset the BIOS settings using the following methods:

• Enter the BIOS setup and press F6 to load the optimized defaults.
• Use the Clear CMOS jumper on the motherboard to reset the BIOS.
• If your motherboard has a Clear CMOS button on the rear I/O panel, press it to reset the BIOS.

Ensure the computer is powered off before clearing the CMOS data. For more details, refer to the Clear CMOS jumper/button section in the manual.

Updating BIOS

Updating BIOS with M-FLASH

Before starting the M-Flash process, make sure you have:

- A USB flash drive with a capacity of 32GB or less that is formatted to FAT32.

M-Flash only supports FAT32 format, and the USB flash drive should not exceed 32GB.

- A computer with internet access.

Please follow the steps below to update BIOS:

1. Download the latest BIOS file from the MSI website that matches your motherboard model, and save it to the USB flash drive.
2. If your motherboard has a Multi-BIOS switch, switch to the target BIOS ROM.
3. Insert the USB flash drive into your motherboard's USB port.

4. Enter flash mode by either:

5. Rebooting and pressing Ctrl + F5 during POST, then clicking Yes to reboot the system.

6. Rebooting and pressing Del during POST to enter BIOS, then clicking the M-FLASH button and clicking Yes to reboot.

7. Select a BIOS file from the M-FLASH File menu and press Enter.

8. When prompted by a File Check message, click Yes to start the BIOS update.

Once the update reaches 100%, the system will reboot automatically.

Updating BIOS with MSI Center

Before updating:

• Ensure the LAN driver is installed, and the internet connection is working properly.
• Close all other applications before updating the BIOS.

To update BIOS:

1. Install and launch MSI Center, then go to Support page.
2. Select Live Update and click on Advance button.
3. Select the BIOS file and click on Install button.
4. The installation reminder will appear, then click the Install button.

The system will automatically restart to update the BIOS. Once the flashing process is complete, the system will restart.

Updating BIOS with Flash BIOS Button

1. Download the latest BIOS file from the MSI website that matches your motherboard model.
2. Rename the BIOS file to MSI.ROM, and save it to the root directory of a USB flash device.
3. Connect the power supply to CPU_PWR1 and ATX_PWR1. (You don't need to install the CPU and memory.)
4. Plug the USB flash device with the MSI.ROM file into the Flash BIOS Port on the rear I/O panel.
5. Press the Flash BIOS Button to start flashing the BIOS. The LED will start flashing to indicate the process has begun.

The LED will turn off when the process is complete.

Regulatory Notices

FCC-B Radio Frequency Interference Statement

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 radiates radio frequency energy, and, if not installed and used in accordance with the 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 into an outlet on a circuit different from that to which the receiver is connected.

NOTE

• The changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
• Shield interface cables and AC power cord, if any, must be used in order to comply with the emission limits.

FCC Conditions

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.

MSI Computer Corp.

901 Canada Court, City of Industry, CA 91748, USA

[phone]

www.msi.com

CE Conformity

Products bearing the CE marking comply with one or more of the following EU Directives as may be applicable:

• RED 2014/53/EU
  • Low Voltage Directive 2014/35/EU
  • EMC Directive 2014/30/EU

• RoHS Directive 2011/65/EU

- Implementing measure Directive 2009/125/EC of ESPR Regulation (EU) 2024/1781

Compliance with these directives is assessed using applicable European Harmonized Standards.

The point of contact for regulatory matters is MSI-Europe: Eindhoven 5706 5692 ER Son, the Netherlands.

For any support regarding the EU General Product Safety Regulation (GPSR), please contact MSI Computer Europe B.V. via [e-mail] Science Park Eindhoven 5706 5692 ER Son, the Netherlands

Compliance Statement of Innovation, Science and Economic Development Canada (ISED)

CAN ICES-003(B)/NMB-003(B)

Australia and New Zealand notice

This equipment incorporates a radio transmitting and receiving device. In normal use, a separation distance of 20 cm ensures that radio frequency exposure levels comply with the Australian and New Zealand Standards.

クラスB情報技術装置

Batteries, battery packs, and accumulators should not be disposed of as unsorted household waste. Please use the public collection system to return, recycle, or treat them in compliance with the local regulations.

BSMI:

廢電池請回收

For better environmental protection, waste batteries should be collected separately for recycling or special disposal.

California, USA:

The button cell battery may contain perchlorate material and requires special handling when recycled or disposed of in California.

For further information please visit:

https://dtsc.ca.gov/perchlorate/

WARNING

- INGESTION HAZARD: This product contains a button cell or coin battery.

- DEATH or serious injury can occur if ingested.

- A swallowed button cell or coin battery can cause Internal Chemical Burns in as little as 2 hours.

- KEEP new and used batteries OUT OF REACH OF CHILDREN

- Seek immediate medical attention if a battery is suspected to be swallowed or inserted inside any part of the body.

• Remove and immediately recycle or dispose of used batteries according to local regulations and keep away from children. Do NOT dispose of batteries in household trash or incinerate.
• Even used batteries may cause severe injury or death. Call a local poison control center for treatment information.
• Battery type: CR2032
• Battery voltage: 3V
  • Non-rechargeable batteries are not to be recharged.
• Do not force discharge, recharge, disassemble, heat above (manufacturer’s specified temperature rating) or incinerate. Doing so may result in injury due to venting, leakage or explosion resulting in chemical burns.
• This product contains an irreplaceable battery.
• This icon indicates that a swallowed button battery can cause serious injury or death. Please keep batteries out of sight or reach of children.

Chemical Substances Information

In compliance with chemical substances regulations, such as the EU REACH Regulation (Regulation EC No. 1907/2006 of the European Parliament and the Council), MSI provides the information of chemical substances in products at:

https://csr.msi.com/global/index

Environmental Policy

• The product has been designed to enable proper reuse of parts and recycling and should not be thrown away at its end of life.
• Users should contact the local authorized point of collection for recycling and disposing of their end-of-life products.
• Visit the MSI website https://csr.msi.com/global/pevn_ewaste and locate a nearby distributor for further recycling information.
• Please visit https://us.msi.com/page/recycling for information regarding the recycling of your product in the US.

WEEE (Waste Electrical and Electronic Equipment) Statement

European Union: This symbol on the product indicates that this product cannot be discarded as municipal waste. Instead, it is your responsibility to dispose of your waste electrical and electronic equipment by handing it over to a designated collection point for recycling. For more information about where you can drop off your waste equipment for recycling, please contact your local city office, your household waste disposal service or the shop where you purchased the product.

日本JIS C 0950材質宣言

This product complies with the “India E-waste (Management and Handling) Rule 2011” and prohibits use of lead, mercury, hexavalent chromium, polybrominated biphenyls or polybrominated diphenyl ethers in concentrations exceeding 0.1 weight % and 0.01 weight % for cadmium, except for the exemptions set in Schedule 2 of the Rule.

Copyright and Trademarks Notice

msi

MSI

微星

微星科技

MICRO-STAR INTERNATIONAL

Copyright © Micro-Star Int’ I Co., Ltd. All rights reserved. The MSI logo used is a registered trademark of Micro-Star Int’ I Co., Ltd. All other marks and names mentioned may be trademarks of their respective owners. No warranty as to accuracy or completeness is expressed or implied. MSI reserves the right to make changes to this document without prior notice.

HDMI™

HIGH-DEFINITION MULTIMEDIA INTERFACE

The terms HDMI™, HDMI™ High-Definition Multimedia Interface, HDMI™ Trade dress and the HDMI™ Logos are trademarks or registered trademarks of HDMI™ Licensing Administrator, Inc.

Technical Support

If a problem arises with your system and no solution can be obtained from the user guide, please contact your place of purchase or local distributor. Alternatively, please try the following help resources for further guidance.

• Visit the MSI website for technical guide, BIOS updates, driver updates, and other information: https://www.msi.com/support/
  • Register your product at: http://register.msi.com

Revision History

• Version 2.0, 2025/09, First release.