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Micro ATX board dark PCB silver heatsinks rear I/O shield

MSI

MSI MAG B550M MORTAR MAX WIFI Micro ATX AMD motherboard

SKU CH-RQG5-G3WD7

Micro ATX board with AMD B550 chipset, AM4 socket, dual-channel DDR4 to 128 GB, one PCIe 4.0 x16 slot, six SATA ports, two M.2 slots, 7.1 audio, Wi-Fi 6E and Bluetooth

  • Processor5600X/5800X/5600G
  • ChipsetAMD B550
  • CPU socketAM4
  • Supported memoryDDR4 2400
  • Max supported RAM128 GB
  • Memory channelsDual Channel
  • Supports Ryzen 5000 and 4000G processors on AM4 socket
  • PCIe 4.0 x16 slot and two M.2 connectors for fast expansion
  • Dual-channel DDR4 up to 4400 MHz via A-XMP OC mode
  • 1-channel audio and Wi-Fi 6E built into rear I/O
  • Micro-ATX form factor with 128 GB maximum memory capacity

Compact AM4 foundation

The MSI MAG B550M MORTAR MAX WIFI is a Micro ATX motherboard built around the AMD B550 chipset for socket AM4 processors. It targets builders who want a small-form-factor board with modern connectivity and room for 128 GB of dual-channel DDR4 memory.

Best for upgrade-focused builds

This board suits owners of Ryzen 5000, 5000 G-Series, 4000 G-Series or 3000 series CPUs who need Wi-Fi 6E, Bluetooth and a single PCIe 4.0 x16 slot in a compact layout. It is not suited for users who require multiple full-length expansion slots or newer socket platforms.

Deciding spec: one PCIe 4.0 x16 slot

Only one PCI Express 4.0 x16 slot is provided, so a discrete graphics card will occupy the sole high-bandwidth lane. Verify that your GPU and any add-in cards fit this constraint before choosing this board.

How it compares

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

Price $150.99
Cheaper than about 62% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model nameMAG B550M MORTAR MAX WIFI
Processor
Processor5600X/5800X/5600G
CPU socketAM4
ChipsetAMD B550
Memory
Supported memoryDDR4 2400
Max supported RAM128 GB
Memory channelsDual Channel
Storage
SATA ports6 x SATA 6Gb/s
M.2 slots2 x M.2
Audio & video
Sound channels7.1 Channels
Connectivity
Bluetooth supportYes
Ports & slots
PCIe 4.0 x16 slots1 x PCI Express 4.0 x16
Rear panel ports1 x HDMI
HDMI ports1 x HDMI
Compatibility
Windows 11 supportSupported

Questions about this item

Will this board run a Ryzen 5 5600X without a BIOS update?

The board supports Ryzen 5000 series processors including the 5600X and 5800X on socket AM4.

What is the fastest memory speed I can use with two dual-rank DIMMs?

With two dual-rank modules the board validates up to 3733 MHz via A-XMP OC mode.

How many M.2 drives can I install and are they PCIe 4.0?

There are two M.2 slots; the chipset is B550 with PCIe 4.0 support for the primary x16 slot.

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