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Micro-ATX motherboard with AM5 socket CPU installed, black PCB and silver heatsinks

ASUS

ASUS PRIME B850M-A WIFI & Ryzen 9 9900X AMD motherboard combo

SKU CH-D9B1-TDV5Z

A motherboard and CPU combo for AM5 socket with 12-core Ryzen 9 9900X, DDR5 up to 8000 MT/s, three M.2 slots, PCIe 5.0, Wi-Fi 6E and 2.5 Gb Ethernet

  • CPU Socket TypeAM5

Motherboard PRIME B850M-A WIFI

Visa 3 fler konfigurationer

CPU + Ryzen 9 9900X

  • 12-core Ryzen 9 9900X delivers 24 threads for heavy multitasking
  • DDR5 memory scales to 8000 MT/s overclocked for faster data rates
  • Three M.2 slots provide up to 128 Gbps total storage bandwidth
  • PCIe 5.0 slot and Realtek 2.5 Gb Ethernet enable high-speed expansion and networking
  • 8+2+1 power stages on a 6-layer PCB with Digi+ VRM ensure stable CPU delivery

ASUS PRIME B850M-A WIFI & Ryzen 9 9900X combo

This motherboard and CPU combo pairs an ASUS PRIME B850M-A WIFI board with the AMD Ryzen 9 9900X processor. The board uses the AM5 socket and micro-ATX form factor. It targets builders who want a ready-matched platform for high-core-count workloads and modern connectivity.

8+2+1 power modules with VRM heatsinks

The board employs an 8+2+1 power-stage design on a 6-layer PCB with Digi+ VRM control. VRM heatsinks and thermal pads manage heat from the 12-core 24-thread Ryzen 9 9900X, which reaches a 5.6 GHz max boost. A dedicated pump header and multiple 4-pin PWM/DC fan headers allow active cooling for the CPU and M.2 slots.

Three M.2 slots plus PCIe 5.0 and USB Type-C

Three M.2 slots deliver up to 128 Gbps total bandwidth for fast storage expansion. The primary PCIe slot supports PCIe 5.0 for next-generation graphics cards. Front-panel USB 5 Gbps Type-C, Realtek 2.5 Gb Ethernet and Wi-Fi 6E provide high-speed wired and wireless networking. DDR5 memory runs up to 8000 MT/s overclocked, with native DDR5-5600 support.

I korthet

  • 12-core Ryzen 9 9900X delivers 24 threads for heavy multitasking
  • DDR5 memory scales to 8000 MT/s overclocked for faster data rates
  • Three M.2 slots provide up to 128 Gbps total storage bandwidth
  • PCIe 5.0 slot and Realtek 2.5 Gb Ethernet enable high-speed expansion and networking
  • 8+2+1 power stages on a 6-layer PCB with Digi+ VRM ensure stable CPU delivery

Specifikationer

BrandASUS
ModelPRIME B850M-A WIFI+R9 9900X
CPU Socket TypeAM5

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Frågor om den här produkten

How do I install the Ryzen 9 9900X onto the AM5 socket without bending pins?

Align the triangle marker on the CPU with the socket corner, lower it gently without force, then secure the retention arm; the pins are on the motherboard, so handle the processor by its edges only.

What maintenance will the VRM cooling and M.2 heatsink need over time?

Dust the VRM heatsinks and M.2 heatsink every few months with compressed air; replace the thermal pads only if you remove the heatsinks for a deep clean or upgrade.

At what DDR5 speed does the memory controller limit sustained performance first?

The Ryzen 9 9900X officially supports DDR5-5600; running kits above that speed relies on overclocking and may hit the controller limit before the board's 8000+ MT/s capability.

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