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Micro-ATX motherboard with large CPU cooler installed

ASUS

ASUS PRIME B650M-K AMD motherboard with Ryzen 9 9950X3D CPU

SKU CH-6HDA-EAD03

Micro-ATX motherboard with Socket AM5, dual-channel DDR5 up to 6400 MHz, four SATA III ports, M.2 support, 2.5 Gb LAN and a 16-core 9950X3D CPU with 128 MB L3 cache

  • ProcessorComputer Accessories

Model PRIME B650M-K

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CPU +Ryzen 9 9950X3D

  • Ready for high-end multitasking with 16 cores and 128 MB L3 cache
  • Fast DDR5 memory support up to 6400 MHz across two slots
  • Room for 96 GB RAM using dual-channel unbuffered modules
  • PCIe 5.0 M.2 and SATA III for versatile storage expansion
  • Integrated AMD Radeon graphics for display output without a discrete card

ASUS PRIME B650M-K with Ryzen 9 9950X3D combo

This bundle pairs a Micro-ATX motherboard with a 16-core desktop processor built on a 4nm process. The board uses the AMD B650 chipset and the Socket AM5 platform. It targets builders who want a compact foundation for a high-end system.

Best for compact high-performance builds

The two DIMM slots support up to 96 GB of dual-channel DDR5 at speeds up to 6400 MHz, suiting users who need strong multi-threaded throughput in a smaller case. Builders requiring four memory slots, extensive PCIe expansion, or integrated Wi-Fi should consider other platforms.

CPU delivers 128 MB L3 cache and 170 W TDP

The included Ryzen 9 9950X3D provides 128 MB of L3 cache alongside 16 MB of L2 cache and a 170 W thermal design power. AMD Radeon graphics are integrated on the processor die. This cache capacity and power envelope are the key figures for cooling and workload decisions.

How it compares

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

Price $862.99
Pricier than about 81% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model namePRIME B650M-K+R9 9950 × 3D
Processor
ProcessorComputer Accessories

Other versions of this model

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Questions about this item

How can I confirm the Ryzen 9 9950X3D is running at its 170W TDP after assembly?

Enter the BIOS and verify the CPU power limit shows 170W, then run a multi-thread load and check that the package power sustains near that figure.

What comes in the box and what must I purchase separately?

The bundle includes the PRIME B650M-K motherboard and the Ryzen 9 9950X3D processor; you must add DDR5 DIMMs, an M.2 or SATA drive, a CPU cooler and a power supply.

Which memory speed should I choose for the 9950X3D on this board?

The board supports DDR5 up to 6400 MHz; select a kit rated at 6000 or 6400 MHz for the best balance of latency and throughput with the 9950X3D.

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