MSI B550M-A PRO Motherboard AMD Ryzen AM4, 2xDDR4, support up to 64GB, 1xPCIe 4.0/3.0 x16 slot, 2xSATA 6Gb, 6xUSB3.0, 6xUSB2.0, DVI-D, HDMI | B550M-A PRO

MSI B550M-A PRO Motherboard AMD Ryzen AM4, 2xDDR4, support up to 64GB, 1xPCIe 4.0/3.0 x16 slot, 2xSATA 6Gb, 6xUSB3.0, 6xUSB2.0, DVI-D, HDMI

SPECIFICATIONS

Model Name
B550M-A PRO

CPU Support
Support 3rd Gen AMD Ryzen™ Desktop Processors and AMD Ryzen™ 4000 G-Series Desktop Processors

CPU Socket
AMD Socket AM4

Chipset
AMD B550 Chipset

Graphics Interface
1x PCI-E 4.0 / 3.0 x16 slot

Display Interface
HDMI™, DVI-D – Requires Processor Graphics

Memory Support
2 DIMMs, Dual Channel DDR4-4600MHz (OC)

Expansion Slots
1x PCI-E 3.0 x1 slot

Storage
1x M.2 Gen4 x4 slot, 4x SATA 6Gb/s ports

USB ports
6x USB 3.2 Gen 1 5Gbps (Type-A) + 6x USB 2.0

LAN
Realtek® RTL8111H Gigabit LAN

Audio
8-Channel (7.1) HD Audio with Audio Boost

Product Last Updated: 10/04/2026

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