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ASUS PRIME B850-PLUS ATX motherboard with Ryzen 7 9700X CPU installed, silver heatsinks and black PCB

ASUS

ASUS PRIME B850-PLUS AMD motherboard & Ryzen 7 9700X CPU combo

SKU CH-FTCS-MJ2S4

A motherboard and CPU combo with a 12+2 phase power design, triple M.2 slots including PCIe 5.0, 2.5Gb Ethernet and a Ryzen 7 9700X processor featuring 8 cores, 16 threads.

  • CPU socketAM5

Motherboard PRIME B850-PLUS

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CPU + R7 9700X

  • Stable power for high-end Ryzen CPUs with 12+2 phase Digi+ VRM design
  • Faster DDR5 speeds on any kit via ASUS Enhanced Memory Profile (AEMP)
  • One PCIe 5.0 and two PCIe 4.0 M.2 slots for ultra-fast storage
  • 5 Gb Ethernet with LANGuard for reliable wired networking
  • 8-core 16-thread Ryzen 7 9700X reaches 5.5 GHz boost for high frame rates

Combo for Ryzen 9000 series builds

This motherboard and CPU combo pairs the ASUS PRIME B850-PLUS board with the AMD Ryzen 7 9700X processor. The board uses the AM5 socket and supports Ryzen 9000, 8000 and 7000 series CPUs. The included 8-core, 16-thread CPU runs on Zen 5 architecture with a max boost clock of 5.5 GHz and 40 MB cache.

PCIe 5.0 M.2 slot and 2.5Gb Ethernet limits

The board provides one PCIe 5.0 x4 M.2 slot rated up to 128 Gbps and two PCIe 4.0 x4 M.2 slots for storage. Network connectivity is handled by a Realtek 2.5Gb Ethernet controller with LANGuard protection. Rear I/O includes USB 10Gbps Type-A and Type-C ports alongside a DisplayPort output.

DDR5-5600 support and unlocked overclocking headroom

The Ryzen 7 9700X officially supports DDR5-5600 memory and is unlocked for overclocking. ASUS AEMP can push higher speeds and tighter timings even on non-EXPO kits. The 12+2 phase power design with Digi+ VRM delivers stable current for the 8-core CPU and leaves headroom for higher-tier Ryzen 9000 chips.

How it compares

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

Price $618.99
Pricier than about 71% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model namePRIME B850-PLUS+R7 9700X
Processor
CPU socketAM5

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