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ATX motherboard in silver and black with large VRM heatsinks and a Ryzen 9 9900X3D CPU in the AM5 socket

ASUS

ASUS ROG Strix B650-A Gaming WiFi AMD motherboard & Ryzen 9 9900X3D combo

SKU CH-22DH-93C2M

Bundled AM5 board with 12 + 2 power stages, one PCIe 5.0 M.2 slot and two PCIe 4.0 M.2 slots, WiFi 6E and 2.5G LAN plus a 12-core Zen 5 CPU with 128 MB L3 cache

  • 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 9900X3D

  • Stable multi-core power delivery with 12 + 2 power stages and ProCool connectors
  • Efficient VRM cooling via massive heatsinks, airflow channels and high-conductivity thermal pads
  • Fast storage potential from one PCIe 5.0 and two PCIe 4.0 M.2 slots with heatsinks
  • High-speed connectivity through USB 3.2 Gen 2x2 Type-C, HDMI 2.1 and DisplayPort 1.4
  • Gaming-grade performance from Ryzen 9 9900X3D with 128MB L3 cache and Radeon graphics

AM5 Motherboard and Ryzen 9 9900X3D Combo

This bundle pairs an ASUS ROG Strix B650-A Gaming WiFi board with an AMD Ryzen 9 9900X3D processor. The motherboard uses the AM5 socket and B650 chipset to support Ryzen 7000, 8000 and 9000 series CPUs. Four DDR5 slots accept up to 128 GB of memory with EXPO profiles. It is aimed at builders who want a high-core-count platform for gaming and content creation.

Upgrade Path from Older AM4 or Entry AM5 Builds

The combo replaces systems based on AM4 socket motherboards or earlier B650 boards with lighter power delivery. The 12 plus 2 power stages and ProCool connectors give headroom for the 120 W Zen 5 CPU. A BIOS update may be required before installing 9000 or 8000 series processors. The jump is worth it when moving to DDR5 memory and PCIe 5.0 storage bandwidth.

Sustained Load Behaviour

Massive VRM heatsinks with cut airflow channels and high-conductivity thermal pads dissipate heat during long multi-core workloads. All three M.2 slots carry dedicated heatsinks to keep PCIe 5.0 and 4.0 drives at stable temperatures. The 2.5 G Ethernet, WiFi 6E and Realtek ALC4080 audio remain responsive under continuous network and streaming demand.

How it compares

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

Price $996.99
Pricier than about 88% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product lineROG
Model nameROG STRIX B650-A Gaming WiFi+R9 9900 × 3D
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

What case clearance is needed for the massive VRM heatsinks on the ROG Strix B650-A Gaming WiFi motherboard?

The board uses massive VRM heatsinks with cut airflow channels; verify your ATX case has sufficient height clearance above the socket area for these heatsinks.

How do I install the Ryzen 9 9900X3D into the AM5 socket without bending pins?

Lift the retention arm, align the gold triangle on the CPU with the socket marker, place the processor gently without pressure, lower the frame, then secure the arm.

When should I replace the thermal pads on the M.2 heatsinks of this motherboard?

Reapply thermal pads if SSD temperatures rise unexpectedly after years of use; the M.2_1, M.2_2 and M.2_3 slots each have dedicated heatsinks with pads.

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