PRIME B650M-A WIFI II Motherboard

Product Information

The PRIME B650M-A WIFI II motherboard is a computer hardware
component manufactured by ASUS. The motherboard supports the latest
Intel processors and DDR4 memory technology. It also features
built-in Wi-Fi connectivity, allowing for easy wireless
connectivity.

Package Contents

• PRIME B650M-A WIFI II motherboard
• User manual and documentation
• I/O shield
• 2 x SATA 6Gb/s cables
• M.2 screw package
• Wi-Fi antennas

Specifications Summary

• CPU: Intel Socket LGA1200 for 11th Gen Intel Core, Pentium Gold
  and Celeron processors

• Chipset: Intel B650 Chipset

• Memory: 4 x DIMM, Max. 128GB, DDR4
  3200/3000/2933/2800/2666/2400/2133 MHz Non-ECC, Un-buffered
  Memory

• Expansion Slots: 1x PCIe 4.0/3.0 x16 slot (supports x16 mode),
  2x PCIe 3.0 x1 slots

• Wi-Fi: Wi-Fi 6 (802.11 a/b/g/n/ac/ax) with MU-MIMO support

• Audio: Realtek ALC897 codec, 7.1 Surround Sound

• Storage: 1x M.2 slot (Key M), supports up to PCIe 4.0 x4 and
  SATA modes, 4x SATA 6Gb/s ports

• USB Ports: 1x USB 3.2 Gen 2×2 port (1x Type-C), 3x USB 3.2 Gen
  2 ports (2x Type-A + 1x Type-C), 4x USB 2.0 ports

Product Usage Instructions

Before using the PRIME B650M-A WIFI II motherboard, ensure that
all components are installed correctly and securely. Refer to the
user manual for detailed installation instructions.

To access the BIOS setup program, press the
Delete key during the boot-up process. In the BIOS
setup program, you can configure various settings such as CPU
frequency, memory timings, and storage options.

The motherboard supports RAID configurations for increased
storage performance and reliability. Refer to the user manual for
detailed instructions on setting up RAID.

The built-in Wi-Fi connectivity allows for easy wireless
networking. To connect to a Wi-Fi network, ensure that the Wi-Fi
antennas are attached to the motherboard and follow the operating
system’s instructions for connecting to a wireless network.

For additional information and software updates, visit the ASUS
website at www.asus.com.

Motherboard

PRIME B650M-A WIFI II

E21432 First Edition November 2022
Copyright © 2022 ASUSTeK COMPUTER INC. All Rights Reserved. No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”). Product warranty or service will not be extended i: (1) the product is repaired, modied or altered, unless such repair, modication o alteration is authorized in writing by ASUS; or (2) the serial number o the product is defaced or missing. ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, 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 USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT. SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT. Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights o their respective companies, and are used only or identication or explanation and to the owners’ benet, without intent to inringe.
ii

Contents
Safety information………………………………………………………………………………………… iv About this guide……………………………………………………………………………………………. v Package contents…………………………………………………………………………………………. vi PRIME B650M-A WIFI II specifcations summary……………………………………………. vi

Chapter 1:

Product Introduction

1.1 Before you proceed………………………………………………………………………….. 1-1

1.2 Motherboard overview ……………………………………………………………………… 1-2

1.3 Central Processing Unit (CPU)………………………………………………………… 1-10

1.4 System memory……………………………………………………………………………… 1-11

Chapter 2:

BIOS and RAID Support

2.1 Knowing BIOS………………………………………………………………………………….. 2-1

2.2 BIOS Setup program ………………………………………………………………………… 2-2

2.3 ASUS EZ Flash 3………………………………………………………………………………. 2-3

2.4 ASUS CrashFree BIOS 3…………………………………………………………………… 2-4

2.5 RAID confgurations…………………………………………………………………………. 2-5

Appendix
Notices ……………………………………………………………………………………………………… A-1 Warranty……………………………………………………………………………………………………. A-8 ASUS contact information………………………………………………………………………… A-10 Service and Support ………………………………………………………………………………… A-10

iii

Safety information
Electrical safety
· To prevent electrical shock hazard, disconnect the power cable rom the electrical outlet before relocating the system.
· When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device.
· Before connecting or removing signal cables from the motherboard, ensure that all power cables are unplugged.
· Seek professional assistance before using an adapter or extension cord. These devices could interrupt the grounding circuit.
· Ensure that your power supply is set to the correct voltage in your area. If you are not sure about the voltage of the electrical outlet you are using, contact your local power company.
· I the power supply is broken, do not try to x it by yoursel. Contact a qualied service technician or your retailer.
Operation safety
· Before installing the motherboard and adding components, carefully read all the manuals that came with the package.
· Before using the product, ensure all cables are correctly connected and the power cables are not damaged. If you detect any damage, contact your dealer immediately.
· To avoid short circuits, keep paper clips, screws, and staples away from connectors, slots, sockets and circuitry.
· Avoid dust, humidity, and temperature extremes. Do not place the product in any area where it may become wet.
· Place the product on a stable surface. · I you encounter technical problems with the product, contact a qualied service
technician or your retailer. · Your motherboard should only be used in environments with ambient temperatures
between 0°C and 40°C.
Button/Coin Batteries Safety Information
WARNING
KEEP OUT OF REACH OF CHILDREN Swallowing can lead to chemical burns, perforation of soft tissue, and death. Severe burns can occur within 2 hours of ingestion. Seek medical attention immediately.
iv

About this guide
This user guide contains the inormation you need when installing and conguring the motherboard.
How this guide is organized
This guide contains the following parts: · Chapter 1: Product Introduction
This chapter describes the features of the motherboard and the new technology it supports. It includes descriptions of the switches, jumpers, and connectors on the motherboard. · Chapter 2: BIOS and RAID Support This chapter tells how to boot into the BIOS, upgrade BIOS using the EZ Flash Utility and support on RAID.
Where to fnd more inormation
Refer to the following sources for additional information and for product and software updates. 1. ASUS website
The ASUS website (www.asus.com) provides updated information on ASUS hardware and software products. 2. Optional documentation Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer. These documents are not part of the standard package.
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used throughout this user guide.
CAUTION: Information to prevent damage to the components and injuries to yourself when trying to complete a task.
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
v

Package contents
Check your motherboard package for the following items.

Motherboard Cables
Miscellaneous Documentation

1 x PRIME B650M-A WIFI II motherboard
2 x SATA 6Gb/s cables 1 x ASUS Wi-Fi moving antennas 1 x I/O Shield 1 x Screw package for M.2 SSD 1 x User guide

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

PRIME B650M-A WIFI II specifcations summary

CPU Chipset Memory
Graphics Expansion Slots
Storage

AMD Socket AM5 or AMD RyzenTM 7000 Series Desktop Processors*

• Refer to www.asus.com for CPU support list.
  AMD B650 Chipset 4 x DIMM, Max. 128GB, DDR5 ECC and Non-ECC, Un-buered Memory* Dual Channel Memory Architecture Supports AMD Extended Proles or Overclocking (EXPOTM) OptiMem II
• Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/.
• Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
  1 x DisplayPort** 1 x VGA port 1 x HDMI® port***
• Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
  ** Supports max. 8K@60Hz as specified in DisplayPort 1.4. ***Supports 4K@60Hz as specified in HDMI 2.1.
  AMD RyzenTM 7000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x16 mode)
  AMD B650 Chipset 2 x PCIe 4.0 x16 slots (support x1 mode)
• Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).
  Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports* AMD RyzenTM 7000 Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
  AMD B650 Chipset M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode) 4 x SATA 6Gb/s ports
• AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10.

(continued on the next page)

vi

PRIME B650M-A WIFI II specifcations summary

Ethernet Wireless & Bluetooth®
USB

1 x Realtek 2.5Gb Ethernet Wi-Fi 6 2×2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Supports 2.4/5GHz requency band Bluetooth® v5.2*

• The Bluetooth version may vary, please refer to the Wi-Fi module manufacturer’s website for the latest specifications.
  Rear USB (Total 8 ports) 2 x USB 3.2 Gen 2 ports (2 x Type-A) 2 x USB 3.2 Gen 1 ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A) Front USB (Total 7 ports) 1 x USB 3.2 Gen 1 connector (supports USB Type-C®) 1 x USB 3.2 Gen 1 header supports 2 additional USB 3.2 Gen 1 ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Realtek 7.1 Surround Sound High Defnition Audio CODEC* – Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking – Supports up to 24-Bit/192kHz playback

Audio
Back Panel I/O Ports
Internal I/O Connectors

Audio Features – Audio Shielding – Premium audio capacitors – Dedicated audio PCB layers

• A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
  2 x USB 3.2 Gen 2 ports (2 x Type-A) 2 x USB 3.2 Gen 1 ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A) 1 x DisplayPort 1 x VGA port 1 x HDMI® port 1 x Wi- Fi Module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBackTM button 1 x PS/2 Keyboard/Mouse combo port Fan and Cooling related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 3 x 4-pin Chassis Fan headers Power related 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector 1 x 4-pin +12V Power connector

(continued on the next page)

vii

PRIME B650M-A WIFI II specifcations summary

Internal I/O Connectors

Storage related 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 3.2 Gen 1 connector (supports USB Type-C®) 1 x USB 3.2 Gen 1 header supports 2 additional USB 3.2 Gen 1 ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 3 x Addressable Gen 2 headers 1 x Aura RGB header 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (AAFP) 1 x S/PDIF Out header 1 x Speaker header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin System Panel header ASUS 5X PROTECTION III
– DIGI+ VRM – LANGuard – Overvoltage Protection – SafeSlot Core+ – Stainless- Steel Back I/O

Special Features
Software Features

ASUS Q-Design – Q-DIMM – Q-LED Core – Q-Slot
ASUS Thermal Solution – VRM heatsink design
ASUS EZ DIY – BIOS FlashBackTM button – BIOS FlashBackTM LED
Aura Sync – Aura RGB header – Addressable Gen 2 headers
ASUS Exclusive Software
Armoury Crate – Aura Creator – Aura Sync – Fan Xpert 2+ – Power Saving
AI Suite 3 – TurboV EVO – DIGI+ VRM – PC Cleaner

(continued on the next page)

viii

PRIME B650M-A WIFI II specifcations summary

Software Features
BIOS Manageability Operating System Form Factor

ASUS CPU-Z MyASUS Norton Anti-virus software (Free Trial version) WinRAR UEFI BIOS ASUS EZ DIY
– ASUS CrashFree BIOS 3 – ASUS EZ Flash 3 – ASUS UEFI BIOS EZ Mode 256 Mb Flash ROM, UEFI AMI BIOS WOL by PME, PXE Windows® 11, Windows® 10 64-bit mATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

· Specifications are subject to change without notice. Please refer to the ASUS website for the latest specifications.
· MyASUS offers a variety of support features such as helping to troubleshoot issues, optimizing product perormance, integrating ASUS sotware, and recovery drive creation. Please scan the QR Code for installation guide and FAQ.

· For more information on downloading and installing drivers and utilities for your motherboard, please scan the QR code below:

ix

x

Chapter 1: Product Introduction

Product Introduction

1

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

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

· The pin definitions in this chapter are for reference only. The pin names depend on the location of the header/jumper/connector.
· For more information on installing your motherboard, please scan the QR code below:

ASUS PRIME B650M-A WIFI II

1-1

1.2 Motherboard overview

5

6

1

24.4cm(9.6in)

4

2

ADD_GEN 2_1 ADD_GEN 2_2

HDMI VGA
DP

ATX_12V_2 ATX_12V_1

DIGI +VRM

CPU_FAN CPU_OPT

11

DDR5 DIMM_A1 (64bit, 288-pin module) DDR5 DIMM_A2 (64bit, 288-pin module) DDR5 DIMM_B1 (64bit, 288-pin module) DDR5 DIMM_B2 (64bit, 288-pin module)

Place this side towards the rear of the
chassis

20

BIOS_FLBK FLBK_LED
KBMS _U32G1_34

18

USB_5_1_2_13 LAN_U32G2_1011

M.2(WIFI) AUDIO
4

3
Audio Codec
AAFP

CHA_FAN1

ATX_PWR

SOCKET AM5
5

24.4cm(9.6in)

M.2_1(SOCKET3)

256Mb BIOS

Ethernet 2280

2260

TPM 2242

PCIE SATA 5.0 X4 X

U32_C6

U32G1_89

9
8
1st

PCIEX16_1

Super I/O

BATTERY

AMD B650

PCIEX16_2

PCIEX16_3

CHA_FAN2

COM_DEBUG

CLRTC

CHA_FAN3

ADD_GEN 2_3 RGB_HEADER SPDIF_OUT USB_1415 USB_1617

2280 COM

PCIE SATA 4.0 X4 X
M.2_2(SOCKET3)

2260

2242

SATA6G_4

F_PANEL SPEAKER

SATA6G_3 SATA6G_2 SATA6G_1

6 17

15 13 4 12 11 16 10 14

7

19

Unplug the power cord before installing or removing the motherboard. Failure to do so can cause you physical injury and damage motherboard components.

1-2

Chapter 1: Product Introduction

1.2.1 Layout contents
1. CPU socket The motherboard comes with an AMD Socket AM5 designed or AMD RyzenTM 7000 Series Desktop Processors.
For more details, refer to Central Processing Unit (CPU).

2. DDR5 DIMM slots
The motherboard comes with Dual Inline Memory Modules (DIMM) slots designed for DDR5 (Double Data Rate 5) memory modules.

For more details, refer to System memory.

3. Expansion slots
This motherboard supports one PCIe 4.0 x16 (supporting x16 mode) graphics card and two PCIe 4.0 x16 (supporting x1 mode) network cards, SCSI cards and other cards that comply with the PCI Express specication.

· Additional PCIe bifurcation and M.2 settings for RAID function are also supported when a Hyper M.2 x16 series card is installed.
· For full details on the PCIe bifurcation, you may visit the support site at https://www.asus.com/support/FAQ/1037507/.
· The Hyper M.2 x16 series card is sold separately. · Adjust the PCIe bifurcation under BIOS settings.

GND FAN PWR FAN IN FAN PWM FAN PWM FAN IN FAN PWR GND

4. Fan headers The Fan headers allow you to connect fans to cool the system.

Header
CPU_FAN CPU_OPT CHA_FAN1 CHA_FAN2 CHA_FAN3

Max. Current
1A 1A 1A 1A 1A

Max. Power
12W 12W 12W 12W 12W

Default Speed
Q-Fan Controlled Q-Fan Controlled Q-Fan Controlled Q-Fan Controlled Q-Fan Controlled

Shared Control
A A –

FAN PWM FAN IN
FAN PWR GND

5. Power connectors These Power connectors allow you to connect your motherboard to a power supply. The power supply plugs are designed to t in only one orientation. Find the proper orientation and push down rmly until the power supply plugs are ully inserted.
Ensure to connect the 8-pin power plug, or connect both the 8-pin and 4-pin power plugs.

· For a ully congured system, we recommend that you use a power supply unit (PSU) that complies with ATX 12V Specication 2.0 (or later version) and provides a minimum power of 350W.
· We recommend that you use a PSU with a higher power output when conguring a system with more power-consuming devices. The system may become unstable or may not boot up i the power is inadequate.

ASUS PRIME B650M-A WIFI II

1-3

· If you want to use two or more high-end PCI Express x16 cards, use a PSU with 1000W power or above to ensure the system stability.
6. M.2 slots (Key M) The M.2 slots allow you to install M.2 devices such as M.2 SSD modules.
· AMD RyzenTM 7000 Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
· AMD B650 Chipset M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
The M.2 SSD module is purchased separately.

7. SATA 6Gb/s ports
The SATA 6Gb/s ports allow you to connect SATA devices such as optical disc drives and hard disk drives via SATA cables.

8. USB 3.2 Gen 1 Type-C® Front Panel connector

NC

VBUS

NC

TX2+

The USB 3.2 Gen 1 Type-C® connector allows you to connect a USB

CC1 VBUS

TX2GND

3.2 Gen 1 Type-C® module for an additional USB 3.2 Gen 1 Type-C®

RX1-

RX2+

RX1+

RX2-

port on the front panel. The USB 3.2 Gen 1 Type-C® connector provides GND

GND

TX1-

D-

data transfer speeds of up to 5 Gb/s.

TX1+ VBUS

D+ CC2

The USB 3.2 Gen 1 Type-C® module is purchased separately.

9. USB 3.2 Gen 1 header
The USB 3.2 Gen 1 header allows you to connect a USB 3.2 Gen 1 module for additional USB 3.2 Gen 1 ports. The USB 3.2 Gen 1 header provides data transfer speeds of up to 5 Gb/s.

USB3+5V IntA_P2_SSRXIntA_P2_SSRX+
GND IntA_P2_SSTXIntA_P2_SSTX+
GND IntA_P2_DIntA_P2_D+

PIN 1 USB3+5V IntA_P1_SSRXIntA_P1_SSRX+ GND IntA_P1_SSTXIntA_P1_SSTX+ GND IntA_P1_DIntA_P1_D+ GND

The USB 3.2 Gen 1 module is purchased separately.

USB+5V USB_P1USB_P1+ GND NC

10. USB 2.0 headers
The USB 2.0 headers allow you to connect USB modules for additional USB 2.0 ports. The USB 2.0 headers provide data transfer speeds of up to 480 Mb/s.

DO NOT connect a 1394 cable to the USB connectors. Doing so will

damage the motherboard!

PIN 1

The USB 2.0 module is purchased separately.

USB+5V USB_P2USB_P2+
GND

11. Addressable Gen 2 headers
The Addressable Gen 2 headers allow you to connect individually addressable RGB WS2812B LED strips or WS2812B based LED strips.

ADD_GEN 2

1-4

Chapter 1: Product Introduction

The Addressable Gen 2 header supports WS2812B addressable RGB LED strips (5V/Data/ Ground), with a maximum power rating of 3A (5V) and the addressable headers on this board can handle a combined maximum of 500 LEDs.
Before you install or remove any component, ensure that the power supply is switched off or the power cord is detached from the power supply. Failure to do so may cause severe damage to the motherboard, peripherals, or components.
· Actual lighting and color will vary with LED strip.
· If your LED strip does not light up, check if the addressable RGB LED strip is connected in the correct orientation, and the 5V connector is aligned with the 5V header on the motherboard.
· The addressable RGB LED strip will only light up when the system is powered on. · The addressable RGB LED strip is purchased separately.

12. Aura RGB header The Aura RGB header allows you to connect RGB LED strips.
The Aura RGB header supports 5050 RGB multi-color LED strips (12V/G/R/B), with a maximum power rating of 3A (12V), and no longer than 3m.
Before you install or remove any component, ensure that the ATX power supply is switched off or the power cord is detached from the power supply. Failure to do so may cause severe damage to the motherboard, peripherals, or components.
· Actual lighting and color will vary with LED strip. · If your LED strip does not light up, check if the RGB LED extension cable and the
RGB LED strip are connected in the correct orientation, and the 12V connector is aligned with the 12V header on the motherboard. · The LED strip will only light up when the system is powered on. · The LED strip is purchased separately.

13. Clear CMOS header
The Clear CMOS header allows you to clear the Real Time Clock (RTC) RAM in the CMOS, which contains the date, time, system passwords, and system setup parameters.
To erase the RTC RAM:

+3V_BAT GND

CLRTC
PIN 1

1. Turn OFF the computer and unplug the power cord.

2. Short-circuit pin 1-2 with a metal object or jumper cap for about 5-10 seconds.

3. Plug the power cord and turn ON the computer.

4. Hold down the key during the boot process and enter BIOS setup to re-enter data.

DO NOT short-circuit the pins except when clearing the RTC RAM. Short- circuiting or placing a jumper cap will cause system boot failure!

ASUS PRIME B650M-A WIFI II

1-5

If the steps above do not help, remove the onboard button cell battery and short the two pins again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the button cell battery.

RXD DTR DSR CTS

DCD TXD GND RTS
RI

14. COM Port header
The COM (Serial) Port header allows you to connect a COM port module. Connect the COM port module cable to this header, then install the module to a slot opening on the system chassis.

COM
PIN 1

The COM port module is purchased separately.

15. Front Panel Audio header The Front Panel Audio header is for a chassis- mounted front panel audio I/O module that supports HD Audio. Connect one end of the front panel audio I/O module cable to this header.
We recommend that you connect a high-denition ront panel audio module to this header to avail o the motherboard’s high-denition audio capability.

PORT1L PORT1R PORT2R SENSE_SEND PORT2L

AGND NC SENSE1_RETUR SENSE2_RETUR

AAFP
PIN 1
HD-audio-compliant pin definition

16. S/PDIF Out header
The S/PDIF Out header allows you to connect the Sony/Philips Digital Interface (S/PDIF) Out module.

SPDIF_OUT

+5V SPDIFOUT GND

The S/PDIF module is purchased separately.

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

+5V GND GND Speaker Out

SPEAKER
PIN 1

F_SPI_HOLD#_R T_SPI_MISO F_SPI_CS0#_R F_SPI_PWR NC H_PCIE_RST# VCCSPI

18. SPI TPM header

This header supports a Trusted Platform Module (TPM) system with a

Serial Peripheral Interface (SPI), allowing you to securely store keys, digital

certicates, passwords, and data. A TPM system also helps enhance

PIN 1

network security, protects digital identities, and ensures platform integrity. TPM

The TPM module is purchased separately.

T_SPI_MOSI T_SPI_CLK GND
TPM_DETECT_L S_SPI_TPM_CS2# S_SPI_TPM_IRQ#

1-6

Chapter 1: Product Introduction

19. System Panel header This header supports several chassis-mounted functions.

+PWR_LED- PWR_BTN

PWR_LED+ PWR_LEDPWR GND

· System Power LED header (PWR_LED)

The 2-pin header allows you to connect the System Power LED. The System Power LED lights up when the system is connected to a power source, or when you turn on the system power, and blinks when the system is in sleep mode.

F_PANEL
PIN 1

HDD_LED+ HDD_LED-
Ground HWRST#
(NC)

· Storage Device Activity LED header (HDD_LED)

+HDD_LED- RESET

The 2-pin header allows you to connect the Storage Device Activity LED. The Storage Device Activity LED lights up or blinks when data is read from or written to the storage device or storage device add-on card.

· Power Button/Soft-off Button header (PWR_BTN)
The 2-pin header allows you to connect the system power button. Press the power button to power up the system, or put the system into sleep or soft-off mode (depending on the operating system settings).

· Reset button header (RESET)
The 2-pin header allows you to connect the chassis-mounted reset button. Press the reset button to reboot the system.

20. BIOS FlashBackTM LED The BIOS FlashBackTM LED lights up or blinks to indicate the status o the BIOS FlashBackTM.
Scan the QR code for more information on BIOS FlashBackTM function.

ASUS PRIME B650M-A WIFI II

1-7

1.2.2 Rear panel connectors

1

2

3

4

56

7

8

9

10

11

12

13 14

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

2. PS/2 Keyboard/Mouse combo port. This port is for a PS/2 keyboard or mouse.

3. USB 2.0 port with BIOS FlashBackTM function. Insert a USB storage device to this Universal Serial Bus (USB) port to run BIOS FlashBackTM.

4. 2.5Gb Ethernet port. This port allows 2.5Gbps Ethernet connection to a Local Area Network (LAN) through a network hub. Refer to the table below for the Ethernet port LED indications.
Realtek 2.5Gb Ethernet port LED indications

Activity Link LED

Status

Description

OFF

No link

GREEN Linked

BLINKING Data activity

Speed LED

Status Description

OFF

No link

GREEN 2.5 Gbps connection

ORANGE

1 Gbps / 100 Mbps / 10 Mbps connection

ACT/LINK LED

SPEED LED

Ethernet port

5. Line In port (light blue). This port connects the tape, CD, DVD player, or other audio sources.
6. Line Out port (lime). This port connects a headphone or a speaker. In 4-channel, 5.1-channel, and 7.1-channel congurations, the unction o this port becomes Front Speaker Out.
7. HDMI® port. This port is or a High-Denition Multimedia Interace (HDMI®) connector, and is HDCP compliant allowing playback of HD DVD, Blu-ray, and other protected content.
8. DisplayPort. This port is for a DisplayPort-compatible device.
9. BIOS FlashBackTM button. Press the BIOS FlashBackTM button for three seconds until the FlashBackTM LED blinks three times, indicating that the BIOS FlashBackTM function is enabled.

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Chapter 1: Product Introduction

To use BIOS FlashBackTM:

1. Visit https://www.asus.com/support/ and download the latest BIOS version for this motherboard.
2. Manually rename the le as P650MAW2.CAP, or launch the BIOSRenamer.exe application to automatically rename the le, then copy it to your USB storage device. The BIOSRenamer.exe application is zipped together with your BIOS le when you download a BIOS le or a BIOS FlashBackTM compatible motherboard.
3. Plug the 24-pin power connector to the motherboard and turn on the power supply (No need to power on the system). Insert the USB storage device to the BIOS FlashBackTM port.
4. Press the BIOS FlashBackTM button or three (3) seconds until the BIOS FlashBackTM LED blinks three times, indicating that the BIOS FlashBackTM unction is enabled.
5. Wait until the light goes out, indicating that the BIOS updating process is completed.

10. USB 3.2 Gen 1 (up to 5Gbps) ports. These 9-pin Universal Serial Bus (USB) ports connect to USB 3.2 Gen 1 devices.
11. USB 2.0 ports. These 4-pin Universal Serial Bus (USB) ports are for USB 2.0 devices.
12. USB 3.2 Gen 2 (up to 10Gbps) ports (teal blue, Type A). These 9-pin Universal Serial Bus 3.2 (USB 3.2) ports are for USB 3.2 Gen 2 devices.
13. Wi-Fi 6 ports. Connect the bundled ASUS Wi-Fi antenna connectors to these ports.

· Ensure that the ASUS 2×2 dual band Wi-Fi antenna is securely installed to the Wi-Fi ports.
· Ensure that the antenna is at least 20 cm away from all persons.
14. Microphone port (pink). This port connects a microphone.
Reer to the audio conguration table or the unction o the audio ports in 2, 4, 5.1, or 7.1-channel conguration.

Audio 2, 4, 5.1 or 7.1-channel confguration

Port
Light Blue (Rear panel)
Lime (Rear panel)
Pink (Rear panel)
Lime (Front panel)
Pink (Front panel)

2-channel
Front Speaker
Out –

4-channel

5.1-channel

7.1-channel

Rear Speaker Out Rear Speaker Out Rear Speaker Out

Front Speaker Out

Front Speaker Out

Front Speaker Out

–

Center/Subwoofer Center/Subwoofer

–

–

–

Side Speaker Out

–

–

–

–

To configure a 7.1-channel audio output:
Use a chassis with HD audio module in the ront panel to support a 7.1-channel audio output.

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1.3 Central Processing Unit (CPU)
This motherboard comes with an AMD Socket AM5 designed for AMD RyzenTM 7000 Series Desktop Processors.
Unplug all power cables before installing the CPU.
· The AM5 socket has a different pinout design. Ensure that you use a CPU designed for the AM5 socket. The CPU fits in only one correct orientation. DO NOT force the CPU into the socket to prevent bending the connectors on the socket and damaging the CPU!
· ASUS will not cover damages resulting from incorrect CPU installation/removal, incorrect CPU orientation/placement, or other damages resulting from negligence by the user.
Installing the CPU

Apply the Thermal Interface Material to the CPU cooling system and CPU before you install the cooling system, if necessary.

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Chapter 1: Product Introduction

1.4 System memory
This motherboard comes with four Double Data Rate 5 (DDR5) Dual Inline Memory Module (DIMM) sockets. The gure illustrates the location o the DDR5 DIMM sockets:

DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2

Channel Channel A Channel B

Sockets DIMM_A1 & DIMM_A2 DIMM_B1 & DIMM_B2

A DDR5 memory module is notched differently from a DDR, DDR2, DDR3 or DDR4 module. DO NOT install a DDR, DDR2, DDR3 or DDR4 memory module to the DDR5 slot.

· You may install varying memory sizes in Channel A and Channel B. The system maps the total size o the lower-sized channel or the dual-channel conguration. Any excess memory rom the higher-sized channel is then mapped or single- channel operation.
· You may install 8 GB, 16 GB, and 32 GB unbuffered, ECC and Non-ECC DDR5 DIMMs into the DIMM sockets.

· The deault memory operation requency is dependent on its Serial Presence Detect (SPD), which is the standard way of accessing information from a memory module. Under the default state, some memory modules for overclocking may operate at a lower requency than the vendor-marked value.
· For system stability, use a more ecient memory cooling system to support a ull memory load.
· Always install DIMMs with the same CAS latency. For optimal compatibility, we recommend that you install memory modules of the same version or date code (D/C) from the same vendor. Check with the retailer to get the correct memory modules.
· Refer to www.asus.com or the latest Memory QVL (Qualied Vendors Lists), and memory requency support depends on the CPU types.

Recommended memory confgurations

DIMM_A2

DIMM_A2 DIMM_B2

DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2

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Installing a DIMM
To remove a DIMM

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Chapter 1: Product Introduction

Chapter 2: BIOS and RAID Support
BIOS and RAID Support

2

For more details on BIOS and RAID configurations, please refer to www.asus.com/support.
2.1 Knowing BIOS
The new ASUS UEFI BIOS is a Unied Extensible Interace that complies with UEFI architecture, offering a user-friendly interface that goes beyond the traditional keyboardonly BIOS controls to enable a more flexible and convenient mouse input. You can easily navigate the new UEFI BIOS with the same smoothness as your operating system. The term “BIOS” in this user manual reers to “UEFI BIOS” unless otherwise specied.
BIOS (Basic Input and Output System) stores system hardware settings such as storage device conguration, overclocking settings, advanced power management, and boot device conguration that are needed or system startup in the motherboard CMOS. In normal circumstances, the default BIOS settings apply to most conditions to ensure optimal performance. DO NOT change the default BIOS settings except in the following circumstances:
· An error message appears on the screen during the system bootup and requests you to run the BIOS Setup.
· You have installed a new system component that requires urther BIOS settings or update.
Inappropriate BIOS settings may result to instability or boot failure. We strongly recommend that you change the BIOS settings only with the help of a trained service personnel.
BIOS settings and options may vary due to different BIOS release versions. Please refer to the latest BIOS version for settings and options.

For more inormation on BIOS congurations, please reer to https://www.asus.com/support, or download the BIOS manual by scanning the QR code.

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2.2 BIOS Setup program
Use the BIOS Setup to update the BIOS or congure its parameters. The BIOS screens include navigation keys and brief onscreen help to guide you in using the BIOS Setup program.
Entering BIOS at startup
To enter BIOS Setup at startup, press or during the Power-On Self Test (POST). If you do not press or , POST continues with its routines.
Entering BIOS Setup after POST
To enter BIOS Setup after POST:
· Press ++ simultaneously.
· Press the reset button on the system chassis.
· Press the power button to turn the system off then back on. Do this option only if you ailed to enter BIOS Setup using the rst two options.
After doing either of the three options, press key to enter BIOS.
· Ensure that a USB mouse is connected to your motherboard if you want to use the mouse to control the BIOS Setup program.
· If the system becomes unstable after changing any BIOS setting, load the default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu or press hotkey .
· If the system fails to boot after changing any BIOS setting, try to clear the CMOS and reset the motherboard to the default value.
· The BIOS Setup program does not support Bluetooth devices.
BIOS menu screen
The BIOS Setup program can be used under two modes: EZ Mode and Advanced Mode. You can change modes from Setup Mode in Boot menu or by pressing the hotkey.

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Chapter 2: BIOS and RAID Support

2.3 ASUS EZ Flash 3
The ASUS EZ Flash 3 feature allows you to update the BIOS without using an OS- based utility.
Ensure to load the BIOS default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu or press hotkey .
To update the BIOS:
· This function can support devices such as a USB flash disk with FAT 32/16 format and single partition only.
· DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure!
1. Insert the USB lash disk that contains the latest BIOS le to the USB port. 2. Enter the Advanced Mode of the BIOS Setup program. Go to the Tool menu to select
ASUS EZ Flash 3 Utility and press . 3. Press the Left/Right arrow keys to switch to the Drive eld. 4. Press the Up/Down arrow keys to nd the USB lash disk that contains the latest BIOS,
and then press . 5. Press the Left/Right arrow keys to switch to the Folder eld. 6. Press the Up/Down arrow keys to nd the BIOS le, and then press