ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen 7000-series processors. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, PRIME B650M-A II-CSM provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features.


Comprehensive controls form the foundation of the ASUS PRIME series. The PRIME B650 motherboard packs flexible tools to tune every aspect of your system, enabling performance tweaks to perfectly match the way you work to maximize productivity.

CPU Performance Boost

AMD Precision Boost Overdrive(PBO) pushes the CPU current and voltage budget to opportunistically increase performance. By aggressively tuning the PBO parameters, AMD‘s algorithm can leverage the motherboard’s robust power solution to ramp up performance even higher.


PRIME B650 series is engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.

VRM Heatsink and Thermal Pad

VRM heatsink and thermal pads improve heat transfer from the MOSFETs and chokes for better cooling performance.

Cooler by Design

Prime B650 series features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS.

Multiple Temperature Sources

Each header can dynamically reference three thermal sensors. Fan Xpert 2+ allows you to map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks.

4-Pin PWM/DC Fan

Each onboard header supports auto-detection of PWM or DC fans.


The PRIME B650 series is built to handle the high core counts and bandwidth demands of AMD processors. ASUS B650 motherboard provides all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible data transfer options.

DDR5 Performance Enhancement

Comprehensive memory tuning options are the cornerstone of PRIME motherboards. With the PRIME B650M-A AX II, you can extract all of the potential out of your DDR5 modules, whether they're from an extreme-speed kit or an entry-level set that would otherwise be locked.

For those who want to fly past stock DDR5 speeds, the PRIME B650M-A AX II is primed and ready for enthusiast-grade kits courtesy of vast AMD Extended Profiles for Overclocking (EXPO™) support. Seasoned veterans can further tweak performance via the extensive array of settings in the UEFI.

Outstanding Audio

Combined onboard features deliver elevated audio

Intelligent design and premium hardware create audio quality unlike anything you’ve ever experienced.



Build your next rig with an AMD Ryzen™ 7000 Series processor and PRIME B650M-A AX II to experience advanced performance. With up to 16 “Zen 4” cores and 32 threads, boost clocks of up to 5.7GHz, and 80MB cache, the AMD Ryzen™ 7000 Series keeps you ahead of the game.1

You’ll also gain access to new features for gamers with AMD Socket AM5, from the speed of DDR5 memory to the increased bandwidth of PCIe® 5.0. AMD Ryzen™ 7000 Series processors and AMD socket AM5 motherboards are unlocked for overclocking to personalize your experience. Gain even more performance when you overclock your DDR5 memory with AMD EXPO™ technology.2

36 months


  • Model :PRIME B650M-A WIFI II-CSM
  • CPU :AMD Socket AM5 for AMD Ryzen™ 7000 Series/ 8000 Series Desktop Processors*
    * Refer to Asus official site for CPU support list.
  • Chipset :AMD B650 Chipset
  • Memory :4 x DIMM, Max. 192GB, DDR5 7600+(OC)/7200(OC)/7000(OC)/6800(OC)/6600(OC)/6400(OC
    )/6200(OC)/6000(OC)/5800(OC)/5600(OC)/ 5400(OC)/ 5200/ 5000/ 4800, ECC and Non-ECC, Un-buffered Memory*Dual Channel Memory Architecture
    Supports AMD Extended Profiles for Overclocking (EXPO™)
    OptiMem II
    * Supported memory types, data rate (speed), and number of DRAM modules vary dep
    ending on the CPU and memory configuration, for more information please refer to
    CPU/Memory Support under the Support tab or visit https:// Asus official site/support/.* Non-ECC, Un-buffered DDR5 Memory supports On-Die ECC function.
  • Graphics :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.
  • Expansion Slots :AMD Ryzen™ 7000 Series Desktop Processors*
    1 x PCIe 4.0 ×16 slot (supports x16 mode)
    AMD Ryzen™ 8000 Series Desktop Processors
    1 x PCIe 4.0 ×16 slot (supports x8/x4 mode)

    AMD B650 Chipset
    2 x PCIe 4.0 ×16 slots (support x1 mode)
    * Please check the PCIe bifurcation table on the support site (https:// Asus official site/support/FAQ/1037507/).
    ** Specifications vary by CPU types.
    - To ensure compatibility of the device installed, please refer tohttps:// Asus official site/support/for the list of supported peripherals.
  • Storage :Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports*
    AMD Ryzen™ 7000 Series Desktop Processors

    M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 ×4 mode)
    AMD Ryzen™ 8000 Series Desktop Processors
    M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 ×4 mode)
    AMD B650 Chipset
    M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 ×4 mode)
    4 x SATA 6Gb/s ports
    * AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10.
  • Ethernet :1 x Realtek 2.5Gb Ethernet
  • Wireless & Bluetooth :Wi-Fi 6
    2×2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax)
    Supports 2.4/5GHz frequency band
    Bluetooth® v5.2
    * The Bluetooth version may vary, please refer to the Wi-Fi module manufacturer’s website for the latest specifications.
  • USB :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
  • Audio :Realtek 7.1 Surround Sound High Definition Audio CODEC*
    - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
    - Supports up to 24-Bit/192 kHz playback
    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.
  • Back Panel I/O 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)
    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 FlashBack™ button
    1 x PS/2 Keyboard/Mouse combo port
  • Internal I/O Connectors :Fan and Cooling related
    1 × 4-pin CPU Fan header
    1 × 4-pin CPU OPT Fan header
    3 × 4-pin Chassis Fan headers
    Power related
    1 × 24-pin Main Power connector
    1 × 8-pin 12V Power connector
    1 × 4-pin +12V Power connector
    Storage related
    2 x M.2 slots (Key M)
    4 x SATA 6Gb/s 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
    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 (14-1pin)
    1 × 10-1 pin System Panel header
  • Special Features :ASUS 5X PROTECTION III
    - DIGI VRM
    - LANGuard
    - Overvoltage Protection
    - SafeSlot Core+
    - Stainless-Steel Back I/O
    ASUS Q-Design
    - Q-DIMM
    - Q-LED core
    - Q-Slot
    ASUS Thermal Solution
    - VRM heatsink design
    - BIOS FlashBack™ button
    - BIOS FlashBack™ LED
    Aura Sync
    - Aura RGB header
    - Addressable Gen 2 headers
  • Software Features :ASUS Exclusive Software
    Armoury Crate
    - Aura Creator
    - Aura Sync
    - Fan Xpert 2+
    - Power Saving
    AI Suite 3
    - TurboV EVO
    - DIGI+ VRM
    - PC Cleaner
    IT Management software supported
    - ASUS Control Center Express(ACCE)
    Norton Anti-virus software (Free Trial version)
    - ASUS CrashFree BIOS 3
    - ASUS EZ Flash 3
  • BIOS :256 Mb Flash ROM, UEFI AMI BIOS
  • Manageability :WOL by PME, PXE
  • Accessories :Cables
    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 ACC Express Activation Key Card
    1 x User guide
  • Operating System :Windows® 11, Windows® 10 64-bit
  • Form Factor :mATX Form Factor
    9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )
Brand ASUS
Unit Of Measure ea

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