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Dark rectangular Micro ATX board with silver heatsinks and black PCB

MSI

MSI MAG B550M MORTAR WIFI SATA 6Gb/s AMD motherboard

SKU CH-244B-V032A

Micro-ATX AMD B550 board with Wi-Fi 6, 2.5G LAN, and DDR4 up to 4400 MHz

  • CPU TypeOpteron
  • Supports 3rd Gen Ryzen CPUs and future Ryzen processors with BIOS update
  • DDR4 memory up to 4400 MHz via A-XMP OC mode for high-speed performance
  • 5 Gigabit LAN provides fast wired network connectivity
  • Wi-Fi 6 delivers wireless speeds up to 2400 Mbps with MU-MIMO support
  • Turbo USB 3.2 Gen 2 Type-C offers 10 Gbps data transfer

AM4 socket B550 micro-ATX board

The MSI MAG B550M MORTAR WIFI is a micro-ATX motherboard built on the AMD B550 chipset for AM4 socket processors. It supports 3rd Gen AMD Ryzen CPUs and future Ryzen processors with a BIOS update. The board includes integrated Wi-Fi 6, 2.5 Gigabit LAN, and a USB 3.2 Gen 2 10Gbps Type-C port.

Builders needing compact Wi-Fi 6

This board suits compact builds that want robust power delivery, extended heatsinks, and M.2 Shield Frozr cooling for sustained SSD speeds. It is not for buyers who need more than two full-length PCIe slots, more than four DDR4 slots, or a larger ATX form factor for additional expansion cards.

Extended heatsinks and 7W/mK pads sustain VRM

Under prolonged load the thickened copper PCB, digital PWM, and extended heatsinks with 7W/mK thermal pads keep voltage regulators and M.2 SSDs cool. Pump fan headers allow liquid-cooling control for consistent flow and noise management during long sessions.

Highlights

  • Supports 3rd Gen Ryzen CPUs and future Ryzen processors with BIOS update
  • DDR4 memory up to 4400 MHz via A-XMP OC mode for high-speed performance
  • 5 Gigabit LAN provides fast wired network connectivity
  • Wi-Fi 6 delivers wireless speeds up to 2400 Mbps with MU-MIMO support
  • Turbo USB 3.2 Gen 2 Type-C offers 10 Gbps data transfer

Specifications

CPU TypeOpteron

Questions about this item

Which Ryzen processor generation do I need to install for the board to post?

The board supports 3rd Gen AMD Ryzen processors on the AM4 socket; future Ryzen CPUs require a BIOS update.

Will my existing DDR4-3200 memory run at its rated speed without manual tuning?

DDR4-3200 is listed as a JEDEC speed, so the memory will operate at that frequency by default.

How can I confirm the 2.5G LAN and Wi-Fi 6 are active after building the system?

Check Device Manager for a 2.5 Gigabit Ethernet adapter and a Wi-Fi 6 controller, then run a speed test to verify throughput.

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