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Green Micro ATX motherboard with silver heatsinks and rear I/O shield

MSI

MSI PRO B550M-P WIFI6E AMD motherboard

SKU CH-3ZFQ-6XAG3 MPN PRO B550M-P WIFI6E

Micro-ATX AM4 board supports Ryzen 3000, 4000 G-Series and 5000 CPUs with four DDR4 slots up to 128 GB at 4400 MT/s, PCIe 4.0 x16 plus dual M.2, Wi-Fi 6E and Bluetooth 5.3

  • ProcessorRyzen 5000 Series, Ryzen 4000 G-Series, Ryzen 3000 Series
  • ChipsetAMD B550
  • Form factorMicro ATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memoryDDR4 4400

Model B550M-P WIFI 6E

  • Supports Ryzen 5000, 4000 G-Series and 3000 Series CPUs on AM4 socket
  • DDR4 memory up to 128 GB at 4400 MT/s across four DIMM slots
  • PCIe 4.0 x16 Steel Armor slot plus dual M.2 with Gen4 x4 support
  • Wi-Fi 6E and Bluetooth 5.3 with Realtek 1 GbE LAN for wireless and wired networking
  • HDMI 2.1, DisplayPort 1.4, VGA and front USB-C on rear I/O with 7.1-channel audio

AM4 Ryzen platform

The MSI PRO B550M-P WIFI6E is an AMD B550 Micro ATX motherboard built for socket AM4 processors. It supports Ryzen 5000 Series, Ryzen 4000 G-Series and Ryzen 3000 Series CPUs. The board targets builders who want a compact foundation for a modern desktop without moving to a newer socket. Dual-channel DDR4 memory and integrated wireless give it broad everyday utility.

PCIe 4.0 x16 primary slot

The single PCI Express 4.0 x16 slot is the specification that decides graphics and high-bandwidth add-in card compatibility. It runs at Gen4 speeds with a compatible Ryzen 5000 or 4000 G-Series processor. A second full-size slot operates at PCI Express 3.0 x16 electrical, while two x1 slots handle smaller expansion cards. This layout fixes the upgrade ceiling for GPUs and capture devices.

128 GB DDR4 4400 headroom

Four 288-pin DIMM slots accept up to 128 GB of unbuffered non-ECC DDR4 at 4400 MT/s overclocked. Dual-channel operation keeps throughput high for multitasking and content creation. Two M.2 sockets provide fast storage; one supports PCIe 4.0 x4 and the other PCIe 3.0 x4. Four SATA 6Gb/s ports add bulk capacity. The Realtek ALC897 codec delivers 7.1-channel audio, while Wi-Fi 6E and Bluetooth 5.3 handle wireless.

How it compares

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

Price $98.99
Cheaper than about 76% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model namePRO B550M-P WIFI6E
Processor
ProcessorRyzen 5000 Series, Ryzen 4000 G-Series, Ryzen 3000 Series
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memoryDDR4 4400
Max supported RAM128 GB
Memory channelsDual Channel
Memory profilesIntel XMP
ECC supportNon-ECC
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots2 x M.2 (Support PCIe 4.0 x4 & SATA)
SATA and RAID support0/1/10
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek RTL8111H
Maximum network speed1 Gbit/s
Wi-Fi standardWiFi IEEE 802.11 a / b / g / n / ac / ax
Bluetooth supportYes
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 x16 slots1 x PCI Express x16
PCIe x1 slots2 x PCI Express x1
PS/2 ports1 x PS/2 keyboard/mouse port
Serial ports1
Video connectorsD-Sub + Display Port + HDMI
HDMI ports1 x HDMI
Ethernet port1 x RJ45
DisplayPort connectors1 x DisplayPort
USB 3.1 ports7 x USB 3.1
USB 3.0 ports7 x USB 3.0
USB 2.0 ports4 x USB 3.0 + 6 x USB 2.0
USB-C ports1 x USB 5 Gbit/s Type-C
Audio jacks3 Ports
Onboard USB headers2 x USB 3.2 + 4 x USB 2.0 + 1 x USB Type-C® header, with USB 3.2 Gen 1
Power
Power connectors24 Pin
Size & build
Form factorMicro ATX
Width and length243.84 mm × 243.84 mm
Shipping weight1.27 kg
Package size284 × 274 × 89 mm
Compatibility
Windows 11 supportSupported
More details
S-videoNo
LightingNone RGB

Other versions of this model

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Questions about this item

What does the DDR4 4400 rating mean once the board is installed in a real system?

The board supports DDR4 memory up to 4400 MT/s when overclocked, with four 288-pin slots running in dual-channel mode for a maximum of 128 GB using non-ECC unbuffered modules.

What interface standard does the primary M.2 slot use and what does that cap in practice?

The first M.2 slot connects via PCIe 4.0 x4, delivering up to 64 Gbps bandwidth for compatible drives, while the second slot operates at PCIe 3.0 x4 speeds.

What does the board physically need to fit or mount inside a case?

It uses the Micro-ATX form factor with an AM4 socket, four DDR4 DIMM slots, one PCIe 4.0 x16 slot with Steel Armor, one PCIe 3.0 x16 slot, two PCIe x1 slots, dual M.2 sockets and standard I/O shield cut-outs.

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