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ATX motherboard with large VRM heatsinks, four DDR5 slots, dual M.2 covers, rear I/O shield and a Ryzen 9 9900X CPU in AM5 socket

ASUS

ASUS TUF GAMING B850-PLUS WIFI & Ryzen 9 9900X AMD motherboard

SKU CH-RX2B-G489C

ATX motherboard with 14+2+1 80A power stages, four DDR5 slots up to 192 GB, dual M.2 PCIe 5.0, 2.5G LAN plus Wi-Fi 7, ten USB ports including 20 Gbps Type-C.

  • Form factorATX
  • Memory slot countDDR5
  • Max supported RAM192 GB
  • Memory channelsDual Channel
  • Width and length12.0 in × 9.6 in
  • Windows 11 support(22H2 & later)

Motherboard TUF GAMING B850 - PLUS WIFI

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CPU + Ryzen 9 9900X

  • Stable power delivery for Ryzen 9000 series with 14+2+1 80A VRM and 8-layer PCB
  • Up to 192GB DDR5 overclocked to 8000 MT/s via AEMP on four slots
  • Comprehensive cooling from enlarged VRM, M.2 and PCH heatsinks with multi-source fan control
  • 5G LAN plus Wi-Fi 7 tri-band reaching 2.9Gbps for low-latency connectivity
  • 12-core 24-thread Ryzen 9 9900X at 5.6GHz boost with 64MB L3 cache

Combo Platform

This bundle pairs the ASUS TUF GAMING B850-PLUS WIFI motherboard with an AMD Ryzen 9 9900X processor. The 12-core, 24-thread CPU uses the Zen 5 architecture and reaches a 5.6 GHz maximum boost clock. It targets builders who want a matched AM5 foundation for high-end gaming or content creation.

Build Integration

The board delivers a 14+2+1 80A power design on an 8-layer PCB with ProCool connectors to sustain the included CPU. Four DDR5 slots support up to 192 GB in dual-channel mode and AEMP profiles up to 8000+ MT/s. Dual M.2 PCIe 5.0 slots and multiple heatsinks keep storage cool. Rear I/O supplies ten ports including USB 20Gbps Type-C and three USB 10Gbps ports.

Buyer Fit

Suits enthusiasts assembling a new AM5 system who value integrated Wi-Fi 7, 2.5G LAN and robust VRM cooling in one purchase. Builders needing a smaller form factor, a different chipset feature set, or a lower-tier processor should evaluate separate components instead.

How it compares

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

Price $771.99
Pricier than about 77% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model nameTUF GAMING B850-PLUS WIFI+R9 9900X
Memory
Memory slot countDDR5
Max supported RAM192 GB
Memory channelsDual Channel
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 support(22H2 & later)

Other versions of this model

5 more in the same range

Questions about this item

What limits the VRM when the Ryzen 9 9900X runs at full load for long periods?

The 14+2+1 80A power stages with 8-layer PCB and ProCool connector are rated to deliver stable current to the 12-core CPU without throttling.

How loud or hot does the board get when the system runs all day?

Enlarged VRM heatsink, multiple M.2 heatsinks, PCH heatsink and intelligent fan monitoring keep temperatures controlled during sustained workloads.

Which memory kit must I already own for this combo to POST?

You need DDR5 modules; the board has four slots supporting dual-channel up to 192GB and AEMP profiles for 8000+ MT/s overclocking.

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