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White mATX motherboard with silver heatsinks and a Ryzen 9 9900X CPU installed

ASUS

ASUS ROG Strix B850-G Gaming WiFi S AMD Motherboard & Ryzen 9 9900X CPU Combo

SKU CH-FHEA-2CQTY

An AM5 motherboard and 12-core Ryzen 9 9900X combo with DDR5 support, PCIe 5.0 x16, WIFI 7 and 256 GB maximum memory

  • CPU Socket TypeAM5
  • ChipsetAMD B850

Motherboard

Struck-through versions exist but are not stocked here.

CPU + Ryzen 9 9900X

  • 12 cores and 24 threads handle heavy workloads
  • 6 GHz max boost speeds up single-thread tasks
  • DDR5 memory support up to 256 GB capacity
  • PCIe 5.0 x16 slot enables fastest graphics cards
  • WiFi 7 built in for low-latency wireless

Combo for AM5 builders

This bundle pairs an ASUS ROG Strix B850-G Gaming WiFi S motherboard with a Ryzen 9 9900X processor. The CPU delivers 12 cores and 24 threads on Zen 5 architecture with a 5.6 GHz max boost and 64 MB L3 cache. The board supports DDR5 memory up to 256 GB across four slots. It targets enthusiasts building a high-performance AM5 system.

Check CPU cooler and memory

The Ryzen 9 9900X ships without a cooler so a compatible AM5 solution must be sourced separately. Verify that chosen DDR5 modules match the board's validated speeds and the CPU's DDR5-5600 baseline. Ensure the power supply provides sufficient 12 V current for the 12-core processor and the board's 8+4 pin EPS connectors. Confirm case clearance for the micro-ATX form factor.

White mATX board with modern I/O

The motherboard features a white finish and micro-ATX layout with a single PCIe 5.0 x16 slot for graphics. Four M.2 sockets provide high-speed storage expansion. Rear I/O includes USB 20 Gbps Type-C and WIFI 7 connectivity. Robust VRM heatsinks and reinforced PCIe slot improve durability during sustained loads.

Highlights

  • 12 cores and 24 threads handle heavy workloads
  • 6 GHz max boost speeds up single-thread tasks
  • DDR5 memory support up to 256 GB capacity
  • PCIe 5.0 x16 slot enables fastest graphics cards
  • WiFi 7 built in for low-latency wireless

Specifications

BrandASUS
ModelROG Strix B850-G Gaming WiFi S+R9 9900X
CPU Socket TypeAM5
ChipsetAMD B850

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

Will the Ryzen 9 9900X fit in the B850 motherboard without a BIOS update?

The motherboard uses the AM5 socket which supports Ryzen 9000 series processors, so the 9900X is natively compatible.

What memory speed does the CPU officially support and what can the board handle?

The Ryzen 9 9900X supports DDR5-5600 natively; the board provides four DDR5 slots with a maximum capacity of 256 GB.

Is a CPU cooler included with this combo or do I need to buy one separately?

The manufacturer states that a cooler is not included, so you will need to purchase a compatible AM5 cooler.

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