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Rectangular ATX motherboard in dark grey with silver heatsinks and four DDR5 slots

MSI

MSI PRO B840-P WIFI AMD motherboard

SKU CH-QV5W-V8HYW MPN PRO B840-P WIFI

ATX board for AM5 Ryzen CPUs with DDR5 up to 8000 MT/s, PCIe 4.0 x16, dual M.2 Gen4, Wi-Fi 7 and 2.5G LAN

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B840
  • Form factorATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryDDR5 4400 / DDR5 4800 / DDR5 5000 / DDR5 5200 / DDR5 5400 /

Model PRO B840-P WIFI

  • Supports AMD Ryzen 7000, 8000 and 9000 series processors via AM5 socket
  • DDR5 memory up to 8000 MT/s overclocked with Memory Boost across four slots
  • Wi-Fi 7 with 320 MHz channel delivers 5.8 Gbps peak speed, 2.4 times faster than Wi-Fi 6
  • 5 Gbps wired LAN and Bluetooth 5.4 for fast, stable connections
  • Two PCIe 4.0 M.2 slots plus four SATA ports for flexible storage expansion

AMD B840 AM5 platform

This motherboard uses the AMD B840 chipset and AM5 socket to support Ryzen 7000, 8000 and 9000 series processors. Four 288-pin DDR5 slots accept memory speeds from 4400 up to 8000 MT/s with Memory Boost, reaching a maximum capacity of 256 GB in dual-channel mode. One PCIe 4.0 x16 slot, one PCIe 3.0 x16 slot and three PCIe 3.0 x1 slots handle graphics and add-in cards, while four SATA 6 Gb/s ports and two M.2 sockets with PCIe 4.0 x4 support provide storage flexibility.

Frozr AI Cooling thermal management

The Frozr AI Cooling feature monitors CPU and GPU temperatures and automatically adjusts system fan duty cycles to match the current load. Realtek ALC897 delivers 7.1-channel audio for everyday multimedia use. Wired networking runs through a Realtek 8125 controller at 2.5 Gbps, and wireless connectivity uses Wi-Fi 7 with a 320 MHz channel capable of 5.8 Gbps, which is 2.4 times faster than Wi-Fi 6. Bluetooth 5.4 handles peripheral links.

EZ M.2 Shield Frozr II and EZ PCIe Clip II

A tool-less M.2 shield snaps onto either M.2 slot without screws, simplifying SSD installation and heat-spreader attachment. The EZ PCIe Clip II releases a graphics card with a single-finger press on the tail latch, even when space behind the card is tight. Rear I/O includes a Clear CMOS button and a Flash BIOS button for firmware recovery without a CPU installed.

How it compares

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

Price $137.99
Cheaper than about 65% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model namePRO B840-P WIFI
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD B840
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryDDR5 4400 / DDR5 4800 / DDR5 5000 / DDR5 5200 / DDR5 5400 / DDR5 5600 / DDR5 5800 / DDR5 6000 / DDR5 6200 / DDR5 6400 / DDR5 6600 / DDR5 6666 / DDR5 6800 / DDR5 7000 / DDR5 7200 / DDR5 7400 / DDR5 7600 / DDR5 7800 / DDR5 7900 / DDR5 7950 / DDR5 8000
Max supported RAM256 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots2 x M.2 (Support PCIe 4.0 x4)
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek 8125
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 4.0 x16 slots1 x PCI Express 4.0 x16
PCIe 3.0 x16 slots1 x PCI Express 3.0 x16
PCIe x1 slots3 x PCI Express 3.0 x1
Rear panel ports1 x Clear CMOS Button / 1 x Flash BIOS Button / 1 x LAN (RJ45) / 1 x USB 3.2 Gen 2 Type-A / 1 x USB 3.2 Gen 2 Type-C / 2 x Antenna Bracket / 2 x USB 3.2 Gen 1 Type-A / 3 x Audio Jacks / 4 x USB 2.0/1.1
Size & build
Form factorATX
Shipping weight1.59 kg
Package size356 × 279 × 76 mm

Other versions of this model

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Questions about this item

How do I install the DDR5 memory modules in the four 288-pin slots, and what step do builders often miss?

Align the notch on each DDR5 module with the slot key, press firmly until both side clips click, then enable the EXPO or XMP profile in BIOS so the memory runs at its rated MT/s instead of the default 4800 MT/s.

What maintenance or replacement will the Wi-Fi 7 and Bluetooth 5.4 module need later?

The wireless module is soldered to the board and has no user-serviceable parts; keep the antenna connectors tight and update drivers through Windows Update or the MSI support page when new releases appear.

What limit appears first on the M.2 slots during sustained heavy writes?

Each M.2 slot runs at PCIe 4.0 x4, so the flash controller on the SSD itself will hit its thermal throttle point before the interface saturates.

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