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Micro-ATX motherboard with socket AM5 and Ryzen 9 9900X CPU installed

ASUS

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

SKU CH-AKC8-FDSX6

Micro-ATX motherboard and 12-core Ryzen 9 9900X processor with DDR5 memory support up to 6400 MHz and 2.5Gb networking

  • CPU TypeComputer Accessories

model PRIME B650M-K

+CPU +Ryzen 9 9900X

  • 12 cores and 24 threads handle heavy multitasking with ease
  • 6 GHz max boost clock speeds up single-threaded workloads
  • DDR5 memory support up to 6400 MHz delivers high bandwidth
  • 64 MB L3 cache reduces latency for demanding applications
  • Micro-ATX form factor fits compact builds without sacrificing features

Combo purpose

This bundle pairs a micro-ATX motherboard with a 12-core Ryzen 9 9900X processor. It targets builders who want a compact platform for multi-threaded workloads such as rendering or compilation. The board provides two DDR5 slots and supports unbuffered ECC memory. Storage options include M.2 and SATA III interfaces with RAID 0, 1 and 10 capability.

Sustained load behaviour

The processor reaches a 5.6 GHz maximum boost frequency and offers 64 MB of L3 cache across 24 threads. Under continuous multi-core work the chip maintains high clocks within its unlocked power envelope. The motherboard uses a dual-channel memory controller rated up to 6400 MHz. Four SATA III ports and an M.2 slot handle steady storage throughput without a secondary controller.

Installation notes

The micro-ATX form factor fits standard mounting holes in most chassis. Only two DIMM slots are present, so the 96 GB maximum requires a pair of 48 GB modules. Builders must verify cooler clearance for the AM5 socket before ordering. Front-panel headers include two USB 2.0 and two USB 3.2 Gen 1 connectors; misaligned pins are the most common cause of post-build USB issues.

Highlights

  • 12 cores and 24 threads handle heavy multitasking with ease
  • 6 GHz max boost clock speeds up single-threaded workloads
  • DDR5 memory support up to 6400 MHz delivers high bandwidth
  • 64 MB L3 cache reduces latency for demanding applications
  • Micro-ATX form factor fits compact builds without sacrificing features

Specifications

BrandASUS
ModelPRIME B650M-K+R9 9900X
CPU TypeComputer Accessories

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

How much power does the Ryzen 9 9900X draw and how hot does it run under sustained all-day loads?

The Ryzen 9 9900X has 12 cores and 24 threads with a 5.6 GHz max boost. The motherboard uses a CPU fan connector and dual-channel DDR5 memory.

What memory and storage must I already own for this combo to boot and run?

You need DDR5 DIMM modules up to 6400 MHz and a storage drive with either a M.2 or SATA III interface. The board supports up to 96 GB across two slots.

Will my existing SATA drives and older PCIe add-in cards work with the PRIME B650M-K?

The motherboard provides four SATA III connectors and supports RAID 0, 1, 10. It also includes USB 2.0 and USB 3.2 Gen 1 headers for front-panel devices.

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