We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
ASUS PRIME B650M-A WIFI II-CSM motherboard with Ryzen 9 9900X CPU, black PCB, silver heatsinks, AM5 socket, DDR5 slots, PCIe 5.0 M.2

ASUS

ASUS PRIME B650M-A WIFI II-CSM AMD motherboard & Ryzen 9 9900X CPU combo

SKU CH-ZDZT-SPZ4G

A motherboard and CPU combo pairing a B650 Mini-ITX board with Wi-Fi 6 and PCIe 5.0 M.2 with a 12-core Ryzen 9 9900X reaching 5.6 GHz boost

  • CPU socketAM5

Model PRIME B650M-A WIFI II-CSM

Show 2 more

CPU +Ryzen 9 9900X

  • 12-core 24-thread Ryzen 9 9900X handles heavy multi-tasking
  • DDR5-5600 support via OptiMem II routing boosts memory stability
  • PCIe 5.0 M.2 slot enables fastest storage speeds
  • Wi-Fi 6 plus 2.5G LAN delivers low-latency networking
  • VRM and PCH heatsinks with Fan Xpert 2+ keep temperatures controlled

AM5 Combo for High-End Builds

This bundle pairs an ASUS PRIME B650M-A WIFI II-CSM motherboard with an AMD Ryzen 9 9900X processor. The board uses the AM5 socket and supports Ryzen 7000 series desktop processors. It targets enthusiasts who want a compact platform with strong multi-threaded performance and modern connectivity options.

Connectivity Limits on B650

The motherboard provides Wi-Fi 6 wireless networking and a Realtek 2.5G wired Ethernet port. One M.2 slot operates at PCIe 5.0 speeds while rear I/O includes USB 3.2 Gen 2 ports and a front-panel USB 3.2 Gen 1 Type-C header. SATA 6 Gbps ports remain available for additional storage drives.

12-Core CPU Headroom

The Ryzen 9 9900X delivers 12 cores and 24 threads based on the Zen 5 architecture with a 5.6 GHz maximum boost frequency. It features 64 MB L3 cache and 12 MB L2 cache and supports DDR5-5600 memory. The unlocked design allows overclocking although a cooler is not included in the package.

How it compares

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

Price $667.99
Pricier than about 73% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASUS
Model namePRIME B650M-A WIFI II-CSM+R9 9900X
Processor
CPU socketAM5

Other versions of this model

5 more in the same range

Questions about this item

Should I pick the 12-core 9900X combo or a lower-core alternative?

The 9900X delivers 12 cores and 24 threads with a 5.6 GHz max boost, suited to heavy multi-threaded workloads; choose a lower-core model only if your tasks do not need that parallel performance.

What does the 5.6 GHz boost mean once the CPU is installed?

It is the maximum single-core frequency the 9900X can reach under load when thermal and power headroom allow; sustained all-core speeds will be lower depending on cooling and motherboard power limits.

How fast can the PCIe 5.0 M.2 slot actually run?

The slot is wired for PCIe 5.0 speeds, so a compatible drive can use the full 5.0 bandwidth; actual throughput also depends on the specific SSD controller and system cooling.

More in Motherboards for AMD CPUs

Similar items