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

ASUS

ASUS PRIME B650M-K + Ryzen 7 9800X3D AMD motherboard

SKU CH-38CJ-GGDPD

Micro-ATX board with DDR5 memory support up to 6400 MHz and 96 GB capacity paired with a Ryzen 7 9800X3D processor

  • CPU TypeComputer Accessories

model PRIME B650M-K

+CPU +Ryzen 7 9800X3D

  • Ryzen 7 9800X3D CPU powers demanding workloads with 96 MB cache
  • PRIME B650M-K motherboard supports DDR5 memory up to 6400 MHz for fast responsiveness
  • Dual-channel DDR5 architecture across two DIMM slots enables up to 96 GB total capacity
  • Four SATA III ports plus M.2 interface allow up to six storage drives with RAID 0, 1, 10 support
  • Micro-ATX form factor fits compact builds while delivering 2.5 Gb Ethernet and USB 3.2 Gen 1 connectivity

Ready-to-build combo

The ASUS PRIME B650M-K motherboard paired with the AMD Ryzen 7 9800X3D processor forms a complete platform for a new system. The board uses the AM5 socket and supports DDR5 memory in dual-channel mode. It accepts up to 96 GB of RAM across two DIMM slots at speeds up to 6400 MHz.

Gaming and productivity focus

This combination suits users who want strong single-thread and multi-thread performance for gaming, content creation or general workloads without stepping up to a larger ATX board. Builders who need four memory slots, additional PCIe lanes or integrated Wi‑Fi should consider other models.

Straightforward assembly

The Micro‑ATX layout fits standard cases and uses a 24‑pin ATX power connector plus a dedicated CPU fan header. With only two memory slots, populating both is simple but leaves no room for later expansion. Ensure the BIOS is current for the 9800X3D before first boot.

Highlights

  • Ryzen 7 9800X3D CPU powers demanding workloads with 96 MB cache
  • PRIME B650M-K motherboard supports DDR5 memory up to 6400 MHz for fast responsiveness
  • Dual-channel DDR5 architecture across two DIMM slots enables up to 96 GB total capacity
  • Four SATA III ports plus M.2 interface allow up to six storage drives with RAID 0, 1, 10 support
  • Micro-ATX form factor fits compact builds while delivering 2.5 Gb Ethernet and USB 3.2 Gen 1 connectivity

Specifications

BrandASUS
ModelPRIME B650M-K+R7 9800X3D
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

What DDR5 memory kit do I need for the PRIME B650M-K to reach its maximum supported speed of 6400 MHz?

You need a DDR5 kit rated for 6400 MHz that runs on the board's two DIMM slots in dual-channel mode; the board officially supports JEDEC speeds up to 6400 MHz with a 96 GB total capacity limit.

Can I keep my existing SATA III SSDs and HDDs when moving to this Socket AM5 platform?

Yes, the motherboard provides four SATA III ports and supports up to six storage drives in total, so current SATA SSDs and HDDs connect directly without adapters.

How do I confirm the Ryzen 7 9800X3D is running at its rated clocks after I assemble the combo?

Enter the UEFI or use a monitoring utility in Windows and verify the CPU reports its advertised boost behaviour and the memory shows the selected DDR5 frequency without errors.

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