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ASUS ROG Strix B650-A motherboard with Ryzen 9 9900X CPU installed, black ATX board with silver VRM heatsinks and silver I/O shield

ASUS

ASUS ROG Strix B650-A Gaming WiFi AMD motherboard & Ryzen 9 9900X combo

SKU CH-V8MQ-MNSN6

Bundled AM5 motherboard with 12 + 2 power stages, PCIe 5.0 M.2 slot, WiFi 6E and a 12-core 24-thread Ryzen 9 9900X reaching 5.6 GHz boost

  • ProcessorSupports AMD Ryzen 7000 Series Desktop Processors* * Refer t
  • ChipsetAMD B650
  • Form factorATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryDDR5 6400+(OC) / 6200(OC) / 6000(OC) / 5800(OC) / 5600(OC) /

Motherboard ROG Strix B650-A Gaming WiFi

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CPU + R9 9900X

  • 12 cores and 24 threads handle heavy workloads with the Ryzen 9 9900X
  • 12 + 2 power stages deliver stable voltage to multi-core processors
  • One PCIe 5.0 and two PCIe 4.0 M.2 slots with heatsinks enable fast storage
  • WiFi 6E and 2.5G LAN provide high-speed wired and wireless networking
  • Four DDR5 slots support up to 128GB with EXPO profiles for memory overclocking

AM5 Platform with Ryzen 9 9900X

This combo pairs a ROG Strix B650-A Gaming WiFi motherboard with a 12-core Ryzen 9 9900X processor. The AM5 socket supports 7000, 8000 and 9000 series CPUs, while the board delivers 12 plus 2 power stages and 8 plus 4 pin ProCool connectors for multi-core workloads. Builders targeting high-throughput gaming or content creation get a ready-matched platform.

Straightforward ATX Install with One BIOS Caveat

The board follows standard ATX mounting and uses familiar 288-pin DDR5 slots, 4.0 and 5.0 M.2 sockets with pre-fitted heatsinks, plus 2.5G LAN and WiFi 6E built in. A BIOS update may be required before the 9900X will post, so plan a USB flash update if the board ships on an older revision. Clear the CMOS button on the rear I/O if the first boot stalls.

Sustained Load Handling on 12 Plus 2 Stages

Massive VRM heatsinks with cut airflow channels and high-conductivity thermal pads keep the 12 plus 2 power stages cool during extended all-core boosts at 5.6 GHz. Dual-channel DDR5 up to 6400 MT/s EXPO and three heatsinked M.2 slots — one 5.0 x4 and two 4.0 x4 — maintain throughput without thermal throttling during long renders or compiles.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $800.99
Pricier than about 78% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASUS
Product lineROG
Model nameROG STRIX B650-A Gaming WiFi+R9 9900X
Processor
ProcessorSupports AMD Ryzen 7000 Series Desktop Processors*
* Refer to www.asus.com for CPU support list.
CPU socketAM5
ChipsetAMD B650
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryDDR5 6400+(OC) / 6200(OC) / 6000(OC) / 5800(OC) / 5600(OC) / 5400(OC) / 5200 / 5000 / 4800
* Supported memory types, data rate(Speed), and number of DRAM module vary depending on the CPU and memory configuration, for more information refer to www.asus.com for memory support list.
* Non-ECC, Un-buffered DDR5 Memory supports On-Die ECC function
Max supported RAM128 GB
Memory channelsDual Channel
ECC supportYes
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
SATA and RAID supportAMD RAIDXpert2 Technology supports both NVMe RAID 0/1/10 and SATA RAID 0/1/10
Audio & video
Audio chipRealtek ALC4080
Sound channelsROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080
- Impedance sense for front and rear headphone outputs
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- High quality 120 dB SNR stereo playback output and 113 dB SNR recording input
- Supports up to 32-Bit/384 kHz playback
Audio Features
- SupremeFX Shielding Technology
- Savitech SV3H712 AMP
- Premium audio capacitors
- Audio cover
Connectivity
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 6E
2 × 2 Wi-Fi 6E (802.11 a/b/g/n/ac/ax)
Supports 2.4/5/6 GHz frequency band*
* WiFi 6E 6 GHz regulatory may vary between countries, and function will be ready in Windows 11 or later.
Bluetooth supportv5.2
Ports & slots
PCIe 5.0 x16 slots1 x PCI Express 5.0 x16
PCIe x1 slots2 x PCIe 4.0/3.0 x1 slots
Onboard USB headers1 x USB 3.2 Gen 2 connector (supports USB Type-C )
1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
1 × 8-pin +12 V Power connector
1 × 4-pin +12 V Power connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportSupported

Other versions of this model

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Questions about this item

Will the motherboard need a BIOS update before I can use the included Ryzen 9 9900X?

The board ships ready for Ryzen 7000 series, but the 9000 series may require a BIOS update. The CPU is already in the box so you can update using the board's USB BIOS FlashBack feature without an older processor.

What DDR5 memory speeds can I run stably with this CPU and board combination?

The motherboard supports DDR5 from 4800 up to 6400+(OC) and AMD EXPO profiles. The Ryzen 9 9900X memory controller handles 5600 natively; faster kits work when EXPO is enabled in BIOS.

How many M.2 drives can I install and which slot gives PCIe 5.0 speed?

Three M.2 slots are available, all with heatsinks. The top slot (M.2_1) runs at PCIe 5.0 x4 from the CPU, while the second and third slots run at PCIe 4.0 x4 from the CPU and chipset respectively.

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