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White micro ATX motherboard with silver heatsinks and four black DDR5 slots

ASRock

ASRock B850M Pro RS WiFi White AMD motherboard

SKU CH-0WV6-94RQS MPN B850M Pro RS WiFi White

Micro-ATX AM5 board with a 10-phase DrMOS VRM, DDR5 to 8000 MT/s, one PCIe 5.0 M.2 and Wi-Fi

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Form factorMicro ATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryUp to 8000+(OC)

Model B850M Pro RS WiFi White

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  • Supports Ryzen 7000 8000 9000 series processors via AM5 socket
  • 128 Gb/s PCIe 5.0 M.2 slot for fastest storage performance
  • 8000+ MHz DDR5 memory overclocking with EXPO and XMP 3.0
  • 256 GB maximum DDR5 capacity across four DIMM slots
  • 15 µm gold PCIe contacts for reliable graphics card connection

Socket AM5 DDR5 platform

The ASRock B850M Pro RS WiFi White is a Micro ATX motherboard built around the AMD B850 chipset for Socket AM5 processors. It accepts Ryzen 7000 Series, Ryzen 8000 Series and Ryzen 9000 Series CPUs with an 8+2+1 phase Dr.MOS power design. Four DDR5 DIMM slots support dual-channel memory up to 256 GB at speeds of 8000+(OC) via AMD EXPO or Intel XMP 3.0 profiles, with ECC capability on un-buffered modules.

Builders who need Gen5 M.2 and 5.0 x16

This board suits compact systems that want a PCIe 5.0 x16 slot with 15µ gold contacts and a CPU-attached Blazing M.2 socket running at Gen5x4 128 Gb/s. Two additional chipset Hyper M.2 sockets provide Gen4x4 64 Gb/s each, while four SATA 6Gb/s ports handle mass storage. Realtek ALC897 7.1-channel audio with Nahimic and Dragon RTL8125BG LAN round out the feature set. Builds requiring more than one PCIe 5.0 x16 slot or higher integrated wireless specifications should consider other options.

One CPU Blazing M.2 at Gen5x4 128 Gb/s

The single specification that decides fitment is the CPU-connected M2_1 socket, which operates at PCIe Gen5x4 128 Gb/s and serves as the first priority for M.2 installation. This lane allocation is fixed by the processor and chipset, so NVMe SSDs needing that bandwidth must occupy M2_1. The remaining M.2 sockets and the PCIe 4.0 x4 slot share chipset lanes, making M2_1 the decisive factor for peak storage throughput.

How it compares

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

Price $111.99
Cheaper than about 72% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASRock
Model nameB850M Pro RS WiFi White
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryUp to 8000+(OC)
Max supported RAM256 GB
Memory channelsDual Channel
Memory profilesAMD EXPO / Intel XMP 3.0
ECC supportYes
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
SATA and RAID support0/1/10
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerDragon RTL8125BG
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 axe
Bluetooth support5.3
Ports & slots
PCIe 5.0 x16 slots1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*
- 15µ Gold Contact in VGA PCIe Slot (PCIE1)
PCIe x4 slots1 x PCIe 4.0 x4 Slot (PCIE2), supports x4 mode*
Rear panel ports2 x Antenna Ports
1 x HDMI Port
1 x DisplayPort 1.4
1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)
1 x USB 3.2 Gen2 Type-C Port
2 x USB 3.2 Gen1 Ports
4 x USB 2.0 Ports
1 x RJ-45 LAN Port
1 x BIOS Flashback Button
HD Audio Jacks: Line in / Front Speaker / Microphone
Onboard USB headers2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
1 x Front Panel Type C USB 3.2 Gen1 Header
Power
Power connectors1 × 24 pin ATX Power Connector
1 × 8 pin 12 V Power Connector (Hi-Density Power Connector)
1 × 4 pin 12 V Power Connector (Hi-Density Power Connector)
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Shipping weight1.18 kg
Package size279 × 254 × 76 mm
Compatibility
Windows 11 supportSupported
In the box
In the box2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas

Other versions of this model

5 more in the same range

Questions about this item

Will a Micro ATX case with standard standoffs accept this board?

Yes, the Micro ATX form factor uses the standard mounting hole pattern found in compatible cases.

Does the 15µ gold contact PCIe 5.0 x16 slot need any extra step when seating a graphics card?

Press the card firmly until the retention latch clicks; the gold contacts do not change the installation method.

Which M.2 slot should hold the primary NVMe drive for Gen5x4 speed?

Install the boot drive in the M2_1 Blazing M.2 socket, which runs at PCIe Gen5x4 with Ryzen 9000 series CPUs.

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