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Micro-ATX motherboard in dark grey with silver heatsinks and AM5 socket plus Ryzen 9 9950X CPU

ASUS

ASUS PRIME B850M-A & Ryzen 9 9950X Combo AMD motherboard

SKU CH-A986-92XH7

A micro-ATX motherboard and 16-core Ryzen 9 9950X combo with three M.2 slots, PCIe 5.0 support, DDR5 8000 MT/s capability, 2.5 Gb Ethernet and front USB 5 Gbps Type-C

  • CPU Socket TypeAM5

Motherboard PRIME B850M-A

Struck-through versions exist but are not stocked here.

CPU + Ryzen 9 9950X

  • 16-core Ryzen 9 9950X delivers 32 threads for heavy workloads
  • DDR5 memory scales to 8000 MT/s overclocked for maximum bandwidth
  • Three M.2 slots provide up to 128 Gbps combined storage throughput
  • PCIe 5.0 slot and 2.5 Gb Ethernet ensure fast modern connectivity
  • 8+2+1 power stages on a 6-layer PCB with Digi+ VRM give stable CPU power

Combo motherboard and CPU

This bundle pairs an ASUS PRIME B850M-A micro-ATX board with a Ryzen 9 9950X processor. The CPU delivers 16 cores and 32 processing threads on the Zen 5 architecture with a 5.7 GHz max boost clock. The motherboard uses the AM5 socket and B850 chipset with a 6-layer PCB and 8+2+1 power modules.

AM5 platform builders seeking DDR5 speed

The board supports DDR5 memory up to 8000 MT/s when overclocked and provides three M.2 slots rated up to 128 Gbps. A Realtek 2.5 Gb Ethernet port handles wired networking while PCIe 5.0 readiness supports modern graphics cards and storage. Builders needing integrated Wi-Fi or a bundled cooler should look elsewhere.

Verify cooler and memory before ordering

The processor ships without a cooling solution so a compatible AM5 cooler must be sourced separately. Confirm that your chosen DDR5 kit matches the board's supported speeds and that your power supply provides the required connectors for the 8+2+1 VRM design. Check case clearance for the micro-ATX form factor and M.2 heatsink height.

Highlights

  • 16-core Ryzen 9 9950X delivers 32 threads for heavy workloads
  • DDR5 memory scales to 8000 MT/s overclocked for maximum bandwidth
  • Three M.2 slots provide up to 128 Gbps combined storage throughput
  • PCIe 5.0 slot and 2.5 Gb Ethernet ensure fast modern connectivity
  • 8+2+1 power stages on a 6-layer PCB with Digi+ VRM give stable CPU power

Specifications

BrandASUS
ModelPRIME B850M-A+R9 9950X
CPU Socket TypeAM5

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Which DDR5 memory speed must I already own to reach the board’s 8000 MT/s overclocked rating?

The motherboard supports DDR5 up to 8000 MT/s when overclocked, so you need DDR5 modules rated for at least that speed to hit the maximum.

Will my existing PCIe 4.0 graphics card run at full speed in the board’s PCIe 5.0 slot?

Yes, the PCIe 5.0 slot is backward compatible, so a PCIe 4.0 card will operate at its native 4.0 speeds without any bottleneck.

How can I confirm the Ryzen 9 9950X is hitting its 5.7 GHz max boost after assembly?

Watch the CPU frequency in the UEFI BIOS hardware monitor or a Windows tool such as Task Manager while running a single-threaded load; it should report up to 5.7 GHz.

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