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ASUS PRIME B850-PLUS WIFI ATX motherboard with Ryzen 7 9850X3D CPU installed, silver heatsinks and black PCB

ASUS

ASUS PRIME B850-PLUS WIFI + Ryzen 7 9850X3D AMD motherboard CPU combo

SKU CH-MR0S-AEM1B

A motherboard and CPU combo pairing a B850 ATX board with DDR5 support, Wi-Fi 6E and 2.5Gb Ethernet with an 8-core, 16-thread Ryzen 7 9850X3D processor featuring 96MB L3 cache and up to 5.6 GHz boost

  • CPU socketAM5
  • Ready-to-build combo with Ryzen 7 9850X3D and B850 motherboard
  • 8 cores, 16 threads and 96 MB L3 cache for gaming speed
  • DDR5 memory tuned by AEMP for stable high-frequency operation
  • Wi-Fi 6E and 2.5 Gb Ethernet plus USB 10 Gbps Type-C
  • 8+2+1 phase VRM with heatsinks keeps power delivery cool

Ready-to-build AM5 combo

This bundle pairs the ASUS PRIME B850-PLUS WIFI motherboard with the AMD Ryzen 7 9850X3D processor. The board uses the AMD B850 chipset on an ATX form factor with an AM5 socket. It is delivered new and targets builders who want a matched CPU and motherboard without separate compatibility checks.

Suits gamers who want 3D V-Cache speed.

The included Ryzen 7 9850X3D brings 8 cores and 16 threads on the Zen 5 architecture with a 5.6 GHz max boost clock. Its 96 MB L3 cache uses second-generation 3D V-Cache technology for lower latency in games. The ATX motherboard requires a standard full-size chassis and will not fit small-form-factor cases.

Three M.2 slots for fast storage expansion

The PRIME B850-PLUS WIFI provides three M.2 sockets for adding high-speed drives. Connectivity includes Wi-Fi 6E, 2.5 Gb Ethernet and USB 10 Gbps Type-C ports. Power delivery uses an 8+2+1 phase design with Digi+ VRM to support Ryzen 9000, 8000 and 7000 series CPUs. DDR5 memory is optimised through AEMP and manual UEFI tuning.

How it compares

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

Price $981.99
Pricier than about 87% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model namePRIME B850-PLUS WIFI +R7 9850 × 3D
Processor
CPU socketAM5

Questions about this item

Will the PRIME B850-PLUS WIFI fit in a standard ATX case?

Yes, the board uses the ATX form factor so it mounts in any case that accepts ATX motherboards.

What is the first step when installing the Ryzen 7 9850X3D into the AM5 socket?

Lift the socket lever, align the triangle on the CPU with the socket corner, place the chip gently without force, then lower the lever to lock it.

Does the 96MB L3 cache on the 9850X3D require any special maintenance later?

No, the cache is internal to the processor and needs no user maintenance; only keep the CPU cooler and VRM heatsinks free of dust for thermal performance.

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