MSI B550M Pro DDR4 AMD Motherboard

The MSI B550M Pro is a Micro-ATX motherboard built on the AMD B550 chipset, designed to pair with AMD Ryzen 5000 Series, Ryzen 3000 Series, and Ryzen 4000 G-Series desktop processors. Note that the Ryzen 5 3400G and Ryzen 3 3200G are explicitly not supported. Its compact 9.6 × 8.3 in (24.4 × 21 cm) form factor makes it a strong choice for small-to-mid-tower builds that still demand mainstream platform performance. Memory support is provided through two DDR4 DIMM slots capable of holding up to 64 GB in dual-channel configuration. JEDEC speeds range from DDR4-1866 through DDR4-3200, while A-XMP overclocking profiles extend that ceiling to 4600 MHz (1DPC 1R). Non-ECC unbuffered and ECC UDIMM (operating in non-ECC mode) modules are both accepted. Storage connectivity is well-rounded for a B550 board at this price point. Four SATA 6 Gb/s ports cover traditional drives, and a single M.2 (Key-M) slot routed from the AMD processor supports PCIe 4.0 x4 or PCIe 3.0 x4 as well as SATA, accepting 2242, 2260, and 2280 form-factor devices. MSI's M.2 Shield Frozr heatsink sits over that slot to dissipate heat and help prevent thermal throttling. RAID 0, 1, and 10 configurations are available across the SATA ports. Display output is handled via a rear VGA port (up to 1920×1200@60 Hz), one HDMI 2.1 port (up to 4096×2160@60 Hz), and one DisplayPort (up to 4096×2160@60 Hz) — all active only when a processor with integrated graphics is installed. The PCIe x16 slot supports PCIe 4.0 or 3.0 depending on the installed processor, and two PCIe 3.0 x1 slots provide additional card expansion. USB connectivity includes four USB 3.2 Gen 1 (5 Gbps) Type-A ports on the rear panel (from the processor), plus two additional USB 3.2 Gen 1 ports via an internal header and six USB 2.0 ports (two rear, four internal). Audio is handled by a Realtek ALC892/ALC897 codec delivering 7.1-channel High Definition Audio, while networking uses a Realtek RTL8111H Gigabit LAN controller. RGB enthusiasts will find both a 4-pin RGB LED header and a 3-pin RAINBOW (addressable) LED header onboard. A TPM module connector, chassis intrusion header, and Clear CMOS jumper round out internal connectivity. MSI's Dragon Center software provides unified control over system monitoring and MSI-exclusive tuning tools. The board ships with a 3-year manufacturer warranty. Verifiable Specifications: • Chipset: AMD B550 • Socket: AM4 • Form Factor: Micro-ATX (9.6 × 8.3 in / 24.4 × 21 cm) • Memory: 2× DDR4 DIMM, max 64 GB; up to DDR4-3200 (JEDEC), up to DDR4-4600 (A-XMP OC) • Storage: 4× SATA 6 Gb/s; 1× M.2 (Key-M) PCIe 4.0/3.0 x4 or SATA (2242/2260/2280) • RAID: 0, 1, 10 (SATA) • Expansion: 1× PCIe x16 (PCIe 4.0/3.0), 2× PCIe 3.0 x1 • Display Out: 1× VGA, 1× HDMI 2.1 (4K@60 Hz), 1× DisplayPort (4K@60 Hz) • USB (rear): 4× USB 3.2 Gen 1 Type-A, 2× USB 2.0 Type-A • Audio: Realtek ALC892/ALC897, 7.1-channel HD Audio • LAN: Realtek RTL8111H (1 GbE) • RGB Headers: 1× 4-pin RGB, 1× 3-pin RAINBOW • Warranty: 3 Years