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MSI PRO B550M-B motherboard, matte black PCB with silver heatsinks and AM4 socket

MSI

MSI PRO B550M-B AMD motherboard

SKU CH-3EQ2-G4T92

Micro-ATX AM4 board with PCIe 4.0, dual-channel DDR4 up to 4600 MT/s, Gen4 M.2 slot and EZ Debug LED for Ryzen 3000, 4000 and 5000 series CPUs

  • CPU socketAM4
  • ChipsetAMD B550
  • Memory channelsDual Channel
  • Software and appsWindows 10
  • Windows 11 supportSupported
  • Supports Ryzen 5000, 4000 and 3000 series processors for broad CPU choice
  • DDR4 memory up to 4600 MT/s overclocked for responsive multitasking
  • PCIe 4.0 slots and Gen4 x4 M.2 interface deliver fast storage throughput
  • Core Boost and DDR4 Boost with M.2 Shield Frozr ensure stable power delivery
  • EZ Debug LED and EZ Installation simplify first-time build troubleshooting

PRO B550M-B motherboard

The MSI PRO B550M-B is an AMD AM4 board built around the B550 chipset. It targets builders who want a compact foundation for Ryzen 5000, 4000 G and 3000 series processors with PCIe 4.0 support.

Check your current parts

Verify that your CPU uses the AM4 socket and that your memory kit is DDR4. The board runs dual-channel DDR4 up to 4600 MT/s when overclocked and requires a compatible Ryzen 5000, 4000 G or 3000 series processor.

Build quality and daily use

Architectural styling meets functional cooling with an M.2 Shield Frozr covering the Gen4 x4 slot. EZ Debug LEDs simplify troubleshooting, while MSI Center software centralises system control for routine adjustments.

How it compares

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

Price $124.99
Cheaper than about 68% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Product linePRO
Model namePRO B550M-B
Part numberPRO B550M-B
Processor
CPU socketAM4
ChipsetAMD B550
Memory
Memory channelsDual Channel
Compatibility
Windows 11 supportSupported

Questions about this item

Does the MSI PRO B550M-B box include Wi-Fi antennas or do they need to be purchased separately?

The board features Wi-Fi AC; antenna connectors are present on the rear I/O, so antennas are typically included in the box.

Should I choose a Ryzen 5000 or Ryzen 3000 CPU for this B550 board?

Both families are supported; Ryzen 5000 gives higher clocks and PCIe 4.0 lanes, while Ryzen 3000 works on the same AM4 socket.

What does the 4600 MT/s DDR4 rating mean once the board is installed in a PC?

It is an overclocked memory ceiling; actual speed depends on the CPU memory controller and the DIMM kit XMP profile you enable in BIOS.

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