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Micro-ATX motherboard with CPU installed, dark PCB and silver heatsinks

ASUS

ASUS PRIME B650M-F + Ryzen 9 9900X AMD motherboard & CPU combo

SKU CH-DMEH-N31EN

A micro-ATX B650 motherboard paired with a 12-core Ryzen 9 9900X CPU for DDR5 AM5 builds

  • CPU Socket TypeAM5

model PRIME B650M-F

+CPU +Ryzen 9 9900X

  • 12-core 24-thread Zen 5 CPU handles heavy AI workloads
  • DDR5-5600 memory support feeds data to 12 cores without bottleneck
  • PCIe 4.0 M.2 slot at 64 Gbps loads large models fast
  • PCH heatsink plus Fan Xpert 2+ keeps sustained boost clocks stable
  • AURA Sync addressable header adds RGB lighting control

Combo for AI-ready AM5 builds

This bundle pairs a B650 micro-ATX motherboard with a Ryzen 9 9900X processor. The 12-core, 24-thread CPU reaches a 5.6 GHz max boost on the Zen 5 architecture. The board delivers DDR5-5600 support, PCIe 4.0 connectivity and a 64Gbps M.2 slot. It targets users building a workstation or high-end desktop for AI workloads.

Check AM5 cooler clearance

The processor requires a socket AM5 cooler; verify your chosen cooler fits the micro-ATX layout and your case height limit. You must supply DDR5 memory — earlier DDR generations are physically incompatible. Confirm your power supply has the necessary 8-pin and 24-pin connectors for this platform. The board provides a single 1Gb wired LAN port and HDMI video output.

Upgrades from Ryzen 7000 or 8000 series on B650

Moving from a Ryzen 7000 or 8000 series chip to the 9900X adds 12 cores, 24 threads and a larger 64 MB L3 cache. The jump is worthwhile when your workloads scale across many threads, such as local AI inference, rendering or heavy multitasking. Existing B650 owners need only a BIOS update and a compatible cooler to install the new CPU.

Highlights

  • 12-core 24-thread Zen 5 CPU handles heavy AI workloads
  • DDR5-5600 memory support feeds data to 12 cores without bottleneck
  • PCIe 4.0 M.2 slot at 64 Gbps loads large models fast
  • PCH heatsink plus Fan Xpert 2+ keeps sustained boost clocks stable
  • AURA Sync addressable header adds RGB lighting control

Specifications

BrandASUS
ModelPRIME B650M-F+R9 9900X
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

Does the combo include a CPU cooler or must one be purchased separately?

The bundle contains the PRIME B650M-F motherboard and the Ryzen 9 9900X processor only; a compatible AM5 cooler is not included and must be sourced separately.

Which memory speed should I select for the 12-core 9900X in this board?

The processor officially supports DDR5-5600; kits rated at that speed will run at spec without manual tuning.

What does the 5.6 GHz boost figure deliver in everyday workloads?

The 5.6 GHz maximum boost clock allows the 12 cores and 24 threads to hit high single-thread frequencies for responsive application performance.

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