MSI B550M-A PRO A520M-A PRO主板说明书

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Contents

Thank you for purchasing the MSI® B550M-A PRO/ A520M-A

PRO motherboard. This User Guide gives information about

board layout, component overview, BIOS setup and software

installation.

Safety Information ...........................................................................................2

Specifications ...................................................................................................3

Rear I/O Panel .................................................................................................6

Overview of Components ................................................................................7

CPU Socket .................................................................................................................8

.9

PCI_E1~2: PCIe Expansion Slots ................................................................................9

M2_1: M.2 Slot ..........................................................................................................10

SATA1~4: SATA 6Gb/s Connectors ...........................................................................10

JFP1, JFP2: Front Panel Connectors .......................................................................11

JAUD1: Front Audio Connector ................................................................................11

ATX_PWR1, CPU_PWR1: Power Connectors ...........................................................12

JUSB1, JUSB2: USB 2.0 Connectors ........................................................................13

JUSB3: USB 3.2 Gen1 Connector .............................................................................13

CPU_FAN1, SYS_FAN1: Fan Connectors .................................................................14

JTPM1: TPM Module Connector ...............................................................................14

JCI1: Chassis Intrusion Connector ...........................................................................15

JCOM1: Serial Port Connector .................................................................................15

JBAT1: Clear CMOS (Reset BIOS) Jumper ...............................................................16

EZ Debug LED ...........................................................................................................16

BIOS Setup ................................................................................................................18

Entering BIOS Setup .................................................................................................18

Resetting BIOS ..........................................................................................................18

.19

Installing Windows® 10 .............................................................................................20

Installing Drivers ......................................................................................................20

Installing Utilities .....................................................................................................20

LAN Port LED Status Table ........................................................................................6

UEFI BIOS .......................................................................................................17

Installing OS, Drivers & Utilities ...................................................................20

Contents

1

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.

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

∙ Ensure that all components are securely connected. Loose connections may cause

the computer to not recognize a component or fail to start.

∙ 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.

∙ Keep this user guide for future reference.

∙ Always turn off the power supply and unplug the power cord from the power outlet

before installing or removing any computer component.

∙ 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.

▪ Liquid has penetrated into the computer.

∙ If any of the following situations arises, get the motherboard checked by service

personnel:

▪ 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.

2

Safety Information

Specifications

CPU

Chipset

Support 3rd Gen AMD Ryzen™ Desktop Processors and AMD

Ryzen™4000 G-Series Desktop Processors

∙ AMD B550 Chipset (B550M-A PRO)

∙ AMD A520 Chipset (A520M-A PRO)

∙ 2x DDR4 memory slots, support up to 64GB*

▪ Supports DDR4 1866/ 2133/ 2400/ 2667/ 2800/ 2933/

3000/ 3066/ 3200 MHz by JEDEC

▪ Supports DDR4 2667/ 2800 /2933 /3000 /3066 /3200

/3466 /3600/ 3733 /3866 /4000 /4133 /4266 /4400/ 4600+

MHz by A-XMP OC MODE

Memory

▫ 1DPC 1R max speed 4600 MHz

▫ 1DPC 2R max speed 3866 MHz

∙ Dual channel memory architecture

∙ Supports un-buffered memory

∙ 1x PCIe 3.0 x1 slot

∙ 1x PCIe x16 slot

∙ Supports non-ECC UDIMM memory

∙ Supports ECC UDIMM memory (non-ECC mode)

* Please refer for more information on

compatible memory.

Expansion Slots

▪ B550M-A PRO supports PCIe 4.0/3.0*

▪ A520M-A PRO supports PCIe 3.0

* PCIe specifications may vary depending on the CPU

installed.

∙ 1x HDMI 2.1 port, supporting a maximum resolution of

4096x2160 @60Hz*

/

**

Onboard

Graphics

∙ 1x DVI-D port, supporting a maximum resolution of

1920x1200 @60Hz*

∙ Maximum shared memory of 16GB

* Available for the processor with integrated graphics.

Realtek® ALC892 Codec

** Graphics specifications may vary depending on the CPU

installed.

Audio

▪ 7.1-Channel High Definition Audio

Continued on next page

Specifications

3

∙ 1x Realtek® RTL8111H 1Gbps LAN controller

AMD B550/A520 Chipset

∙ 4x SATA 6Gb/s ports

Continued from previous page

∙ 1x M.2 slot (Key M) (from AMD Processor)

Storage

▪ B550M-A PRO supports PCIe 4.0/3.0*

▪ A520M-A PRO supports PCIe 3.0

▪ Supports SATA 6Gb/s

* PCIe specifications may vary depending on the CPU

installed.

AMD B550/A520 Chipset

USB

▪ 2x USB 3.2 Gen 1 5Gbps ports are available through the

internal USB 3.2 Gen 1 5Gbps connector

▪ 6x USB 2.0 ports (2 Type-A ports on the back panel, 4

ports through the internal USB 2.0 connectors)

▪ Supports 2242/ 2260/ 2280 storage devices

AMD Processor

∙ 1x 24-pin ATX main power connector

∙ 1x 4-pin ATX 12V power connector

∙ 4x SATA 6Gb/s connectors

∙ 1x M.2 slots (M-Key)

Internal

Connectors

▪ 4x USB 3.2 Gen 1 5Gbps Type-A ports on the back panel

∙ 1x USB 3.2 Gen 1 5Gbps connector (supports additional 2

USB 3.2 Gen 1 5Gbps ports)

∙ 1x 4-pin CPU fan connector

∙ 1x 4-pin system fan connector

∙ 2x System panel connectors

∙ 1x TPM module connector

∙ 1x Clear CMOS jumper

∙ 2x USB 2.0 connectors (supports additional 4 USB 2.0 ports)

∙ 1x Front panel audio connector

∙ 1x Chassis Intrusion connector

Continued on next page

4

Specifications

∙ 1x HDMI port

Continued from previous page

∙ 1x DVI-D port

Back Panel

Connectors

∙ 1x PS/2 mouse port

∙ 1x PS/2 keyboard port

∙ 1x LAN (RJ45) port

∙ 4x USB 3.2 Gen 1 5Gbps Type-A ports

∙ 2x USB 2.0 Type-A ports

∙ 3x audio jacks

I/O Controller

Hardware

Monitor

Form Factor

NUVOTON NCT6687-R Controller Chip

∙ CPU/ System fan speed detection

∙ mATX Form Factor

∙ 1x 256 Mb flash

∙ UEFI AMI BIOS

∙ Multi-language

∙ CPU/ System fan speed control

∙ CPU/ System/ Chipset temperature detection

∙ 9.3 in. x 7.9 in. (23.6 cm x 20 cm)

BIOS Features

∙ ACPI 6.0, SMBIOS 2.8

∙ Drivers

Software

∙ DRAGON CENTER

∙ CPU-Z MSI GAMING

∙ Google Chrome™, Google Toolbar, Google Drive

∙ Norton™ Internet Security Solution

∙ User Scenario

∙ Hardware Monitor

Dragon Center

Features

∙ True Color

∙ Speed Up

∙ Live Update

∙ Smart Tool

∙ Super Charger

Please refer to

/manual/

mb/ for

more details.

Specifications

5

Rear I/O Panel

DVI-D

PS/2 Mouse

LAN

Line-out

Line-in

PS/2 Keyboard

Mic in

USB 3.2 Gen 1

USB 2.0 Type-A

(5Gbps) Type-A

LAN Port LED Status Table

Link/ Activity LED

Status

No link

Linked

Off

Description

Speed LED

Off

Status

Yellow

BlinkingData activity

Green

10 Mbps connection

1 Gbps connection

Description

Orange

100 Mbps connection

Audio 7.1-channel Configuration

To configure 7.1-channel audio, you have to connect front audio I/O module to JAUD1

connector and follow the below steps.

1. Click on the Realtek HD Audio Manager > Advanced Settings to open the dialog

below.

2. Select Mute the rear output device, when a front headphone plugged in.

3. Plug your speakers to audio jacks on rear and front I/O panel. When you plug into

a device at an audio jack, a dialogue window will pop up asking you which device

is current connected.

6

Rear I/O Panel

Overview of Components

SYS_FAN1

CPU_PWR1

Processor Socket

CPU_FAN1

DIMMA1

DIMMB1

50.89mm*

ATX_PWR1

PCI_E1

JTPM1

M2_1

PCI_E2

SATA4

SATA3

JFP2

JAUD1

JFP1

JCOM1

JCI1

JUSB1

JUSB2

JBAT1

JUSB3

SATA1

SATA2

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

Overview of Components

7

CPU Socket

Please install the CPU into the CPU socket as shown below.

1

2

4

5

7

6

8

3

∙

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.

∙

Always unplug the power cord from the power outlet before installing or removing

the CPU.

∙

When installing a CPU, always remember to install a CPU heatsink. A CPU heatsink

is necessary to prevent overheating and maintain system stability.

∙

Confirm that the CPU heatsink has formed a tight seal with the CPU before booting

your system.

⚠

Important

∙

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.

∙

If you purchased a separate CPU and heatsink/ cooler, Please refer to the docu-

mentation in the heatsink/ cooler package for more details about installation.

8

Overview of Components

DIMM Slots

1

Please install the memory module into the DIMM slot as shown below.

3

2

2

∙

Due to chipset resource usage, the available capacity of memory will be a little less

than the amount of installed.

∙

Please note that the maximum capacity of addressable memory is 4GB or less

for 32-bit Windows OS due to the memory address limitation. Therefore, we recom-

mended that you to install 64-bit Windows OS if you want to install more than 4GB

memory on the motherboard.

⚠

Important

1

3

PCI_E1~2: PCIe Expansion Slots

PCI_E1: PCIe 3.0 x1 (PCH)

PCI_E2: PCIe 4.0/ 3.0 x16 (CPU)

∙

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.

∙

If you install a large and heavy graphics card, you need to use a tool such as MSI

Gaming Series Graphics Card Bolster to support its weight to prevent deformation

of the slot.

⚠

Important

Overview of Components

9

M2_1: M.2 Slot

3

Please install the M.2 device into the M.2 slot as shown below.

2

30º

Supplied

M.2 screw

Standoff

1

SATA1~4: SATA 6Gb/s Connectors

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

SATA device.

SATA1

SATA3

SATA4

SATA2

∙

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.

∙

Please do not fold the SATA cable at a 90-degree angle. Data loss may result

during transmission otherwise.

⚠

Important

10

Overview of Components

JFP1, JFP2: Front Panel Connectors

Power LED

2

1

These connectors connect to the switches and LEDs on the front panel.

Power Switch

10

9

-

1

3

5

7

9

HDD LED +

HDD LED -

2

4

6

8

Power LED +

Power LED -

+

-

+

HDD LEDReset Switch

Reserved

Reset Switch

Reset Switch

Reserved

Power Switch

Power Switch

No Pin

+

--

+

10

R

E

S

E

T

S

W

H

D

D

L

E

D

HDD LED

HDD LED -

HDD LED +

POWER LED

POWER LED -

POWER LED +

JFP2

1

Buzzer

Speaker

J

F

1

3

P

Speaker -

Buzzer -

1

2

4

Buzzer +

Speaker +

JAUD1: Front Audio Connector

2

1

10

9

1

3MIC R

MIC L

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

2

4

+

-

+

-

Ground

NC

9

7

5Head Phone R

SENSE_SEND

Head Phone L10

8

6MIC Detection

Head Phone Detection

No Pin

Overview of Components

11

ATX_PWR1, CPU_PWR1: Power Connectors

These connectors allow you to connect an ATX power supply.

1

2

1224

3

4

ATX_PWR1

+3.3V

+3.3V

+5V

13

14

15

16

17

18

19

20

22

24

4

3

23

21

+3.3V

Ground

-12V

Ground

Ground

Ground

5VSB

+12V

+12V

+5V

5

PS-ON#

Ground

Ground

Ground

Res

+5V

+5V

+5V

6

7

8

9

113

PWR OK

12

4

2

3

1

CPU_PWR1

11

1

10

+3.3V

Ground

Ground

Ground

+12V

+12V

Make sure that all the power cables are securely connected to a proper ATX power

supply to ensure stable operation of the motherboard.

⚠

Important

2

12

Overview of Components

JUSB1, JUSB2: USB 2.0 Connectors

2

1

10

9

3

1

5

9

USB0-

VCC

These connectors allow you to connect USB 2.0 ports on the front panel.

2

4

6

10

8

∙

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® SUPER CHARGER software.

⚠

Important

7Ground

No Pin

USB0+

Ground

NC

USB1+

USB1-

VCC

JUSB3: USB 3.2 Gen1 Connector

1

2

1

20

10

11

3

5

4

6

8

9

Power

These connectors allow you to connect USB 3.2 Gen1 ports on the front panel.

USB3_RX_DN

USB3_RX_DP

Ground

11

12

13

14

15

16

18

19

20

17

USB2.0+

USB2.0-

Ground

USB3_TX_C_DN

USB3_TX_C_DP

USB2.0-

NC

Ground

USB3_TX_C_DN

USB3_RX_DP

Power

Ground

USB3_TX_C_DP

7

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

damage.

⚠

Important

10

USB2.0+

USB3_RX_DN

No Pin

Overview of Components

13

CPU_FAN1, SYS_FAN1: Fan Connectors

PWM Mode fan connectors provide constant 12V output and adjust fan speed with

speed control signal. When you plug a 3-pin (Non-PWM) fan to a fan connector in

PWM mode, the fan speed will always maintain at 100%, which might create a lot of

noise.

Connector

CPU_FAN1

SYS_FAN1

mode

PWM mode

PWM mode

Max. current

1A

1A

power

12W

12W

1

1

3

PWM Mode pin definition

Sense4

2

Speed Control Signal

+12V1

3

1

DC Mode pin definition

Ground

Sense

2

4

Voltage Control

NC

Ground

⚠

Important

You can adjust fan speed in BIOS > Hardware Monitor.

JTPM1: TPM Module Connector

1SPI Power

Reserved

Ground

This connector is for TPM (Trusted Platform Module). Please refer to the TPM

security platform manual for more details and usages.

3

Master In Slave Out (SPI

Data)

2

4

2

1

12

11

5

11

9

7

Reserved

Reserved

10

12

8

6

Master In Slave In (SPI

Data)

SPI Reset

Interrupt Request

No Pin

SPI Clock

SPI Chip Select

14

Overview of Components

JCI1: Chassis Intrusion Connector

Normal

(default)

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

Trigger the chassis

intrusion event

Using chassis intrusion detector

2. Close the chassis cover.

1. Connect the JCI1 connector to the chassis intrusion switch/ sensor on the

chassis.

3. Go to BIOS > SETTINGS > 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

2. Set Chassis Intrusion to Reset.

1. Go to BIOS > SETTINGS > Security > Chassis Intrusion Configuration.

3. Press F10 to save and exit and then press the Enter key to select Yes.

JCOM1: Serial Port Connector

2

1

10

9

3

1

SOUT

RTS

RI

DCD

This connector allows you to connect the optional serial port with bracket.

4

2

5

7

Ground6

910

8

DSR

No Pin

CTS

DTR

SIN

Overview of Components

15

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.

3. Remove the jumper cap from JBAT1.

4. Plug the power cord and power on the computer.

2. Use a jumper cap to short JBAT1 for about 5-10 seconds.

EZ Debug LED

These LEDs indicate the status of the motherboard.

CPU - indicates CPU is not detected or fail.

VGA - indicates GPU is not detected or fail.

DRAM - indicates DRAM is not detected or fail.

BOOT - indicates booting device is not detected or fail.

16

Overview of Components

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.

⚠

Important

The term BIOS in this user guide refers to UEFI BIOS 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 unlimited number of partitions.

∙ Supports more than 4 primary partitions with a GUID Partition Table (GPT).

∙ 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 64-bit

Windows 10 operating system.

∙ Older graphics card - the system will detect your graphics card. When display a

warning message There is no GOP (Graphics Output protocol) support detected in

this graphics card.

⚠

Important

We recommend that you to use a GOP/ UEFI compatible graphics card.

How to check the BIOS mode?

CPU Temperature:

Motherboard Temperature:

VCore:

DDR Voltage:

BIOS Mode: UEFI/CSM

UEFI boot mode

After entering the BIOS, find the BIOS Mode at the top of the screen.

CPU Temperature:

Motherboard Temperature:

VCore:

DDR Voltage:

BIOS Mode: UEFI/CSM

CSM boot mode

UEFI BIOS

17

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.

∙

BIOS items are continuous update for better system performance. Therefore, the

description may be slightly different from the latest BIOS and should be held for

reference only. You could also refer to the HELP information panel for BIOS item

description.

∙

The BIOS items will vary with the processor.

⚠

Important

Entering BIOS Setup

Function key

F1: General Help

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.

F2: Add/ Remove a favorite item

F3: Enter Favorites menu

F4: Enter CPU Specifications menu

F5: Enter Memory-Z menu

F6: Load optimized defaults

F7: Switch between Advanced mode and EZ mode

F8: Load Overclocking Profile

F9: Save Overclocking Profile

Ctrl+F: Enter Search page

F10: Save Change and Reset*

F12: Take a screenshot and save it to USB flash drive (FAT/ FAT32 format only).

* When you press F10, a confirmation window appears and it provides the

modification information. Select between Yes or No to confirm your choice.

Resetting BIOS

You might need to restore the default BIOS setting to solve certain problems. There

are several ways to reset BIOS:

∙ Go to BIOS and press F6 to load optimized defaults.

∙ Short the Clear CMOS jumper on the motherboard.

⚠

Important

18

UEFI BIOS

Please refer to the Clear CMOS jumper section for resetting BIOS.

Updating BIOS

Before updating:

Updating BIOS:

Updating BIOS with M-FLASH

Please download the latest BIOS file that matches your motherboard model from MSI

website. And then save the BIOS file into the USB flash drive.

1. Insert the USB flash drive that contains the update file into the USB port.

2. Please refer the following methods to enter flash mode.

▪ Reboot and press Ctrl + F5 key during POST and click on Yes to reboot the

system.

▪ Reboot and press Del key during POST to enter BIOS. Click the M-FLASH

button and click on Yes to reboot the system.

3. Select a BIOS file to perform the BIOS update process.

4. When prompted click on Yes to start recovering BIOS.

5. After the flashing process is 100% completed, the system will reboot

automatically.

Updating the BIOS with Dragon Center

Before updating:

Updating BIOS:

Make sure the LAN driver is already installed and the internet connection is set

properly.

1. Install and launch MSI DRAGON CENTER and go to Support page.

2. Select Live Update and click on Advance button.

3. Click on Scan button to search the latest BIOS file.

4. Select the BIOS file and click on Download icon to download and install the latest

BIOS file.

5. Click Next and choose In Windows mode. And then click Next and Start to start

updating BIOS.

6. After the flashing process is 100% completed, the system will restart

automatically.

UEFI BIOS

19

Installing OS, Drivers & Utilities

Installing Windows® 10

1. Power on the computer.

Please download and update the latest utilities and drivers at

2. Insert the Windows® 10 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® 10 installation disc/USB from the Boot Menu.

7. Follow the instructions on the screen to install Windows® 10.

6. Press any key when screen shows Press any key to boot from CD

message.

Installing Drivers

1. Start up your computer in Windows® 10.

2. Insert MSI® Driver Disc into your optical drive.

3. Click the Select to choose what happens with this disc pop-up notification,

then select Run to open the installer. If you turn off the AutoPlay

feature from the Windows Control Panel, you can still manually execute the

from the root path of the MSI Driver Disc.

4. The installer will find and list all necessary drivers in the Drivers/Software tab.

5. Click the Install button in the lower-right corner of the window.

7. Click OK button to finish.

8. Restart your computer.

6. The drivers installation will then be in progress, after it has finished it will prompt

you to restart.

Installing Utilities

2. Click the Utilities tab.

Before you install utilities, you must complete drivers installation.

1. Open the installer as described above.

3. Select the utilities you want to install.

4. Click the Install button in the lower-right corner of the window.

6. Click OK button to finish.

7. Restart your computer.

5. The utilities installation will then be in progress, after it has finished it will

prompt you to restart.

20

Installing OS, Drivers & Utilities

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