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White mATX motherboard and Ryzen 9 9900X3D CPU combo

ASUS

ASUS ROG Strix B850-G Gaming WiFi S + Ryzen 9 9900X3D Combo

SKU CH-GQP3-YTPY3

A white mATX AM5 board with DDR5 memory support up to 256GB, PCIe 5.0 x16 graphics slot, WIFI 7 connectivity and a bundled 12-core Ryzen 9 9900X3D processor featuring 128MB L3 cache

  • CPU Socket TypeAM5
  • ChipsetAMD B850

Motherboard

Struck-through versions exist but are not stocked here.

CPU + Ryzen 9 9900X3D

  • 12-core CPU with 128MB L3 cache for heavy multitasking
  • DDR5 memory support up to 256GB across four slots
  • PCIe 5.0 x16 slot ready for next-gen graphics cards
  • WiFi 7 connectivity built into the B850 motherboard
  • Integrated Radeon graphics provide display output without a discrete GPU

Combo Contents

This bundle pairs an ASUS ROG Strix B850-G Gaming WiFi S motherboard with an AMD Ryzen 9 9900X3D processor. The board uses the AMD B850 chipset and an AM5 socket. It supports Ryzen 9000, 8000 and 7000 series desktop processors. The CPU is a 120W TSMC 4nm FinFET Granite Ridge part with 12 cores and 16 threads.

Installation Notes

The motherboard has 4 DIMM slots for DDR5 memory up to 256GB total. A single PCIe 5.0 x16 slot accepts a graphics card. Mount the CPU in the AM5 socket, secure the cooler, then populate memory slots according to the manual. Common issues include forgetting the BIOS update required for newer Ryzen 9000 series chips and misaligning the CPU notches.

Compatibility Check

Verify your power supply has the required 8-pin and 24-pin connectors for a 120W CPU and B850 board. Ensure the case fits a micro-ATX motherboard and provides clearance for the CPU cooler height. Confirm the chassis has front-panel USB headers that match the board’s USB 20Gbps Type-C connector. Memory must be DDR5; older generations will not fit.

Highlights

  • 12-core CPU with 128MB L3 cache for heavy multitasking
  • DDR5 memory support up to 256GB across four slots
  • PCIe 5.0 x16 slot ready for next-gen graphics cards
  • WiFi 7 connectivity built into the B850 motherboard
  • Integrated Radeon graphics provide display output without a discrete GPU

Specifications

BrandASUS
ModelROG STRIX B850-G GAMING WIFI S +(R9 9900X3D)
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

How can I confirm the Ryzen 9 9900X3D is running at its 120W TDP after build?

Check CPU package power in HWInfo or BIOS hardware monitor under load; the 120W TDP figure is the design target for the Zen 5 chip.

Which components come in the combo box and what must I add?

Box includes the ROG Strix B850-G Gaming WiFi S motherboard and Ryzen 9 9900X3D CPU; you must add DDR5 memory, storage, GPU, PSU, case and CPU cooler.

Which memory capacity should I choose for this 4-slot board?

The board has 4 DIMM slots supporting up to 256GB DDR5; populate 2 slots first for best signal integrity, then expand to 4 if workloads need more capacity.

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