The MSI B550-A PRO is an AMD B550 (AM4) ATX motherboard designed for AMD Ryzen 3000/5000 series processors. It features a robust 8+2+1 phase VRM design with DrMOS for stable power delivery, supporting Dual Channel DDR4 memory with speeds up to 4400MHz(OC) across 4 DIMM slots. The board provides PCIe 4.0 x16 slot with steel armor reinforcement, plus 1x PCIe 3.0 x16 slot and 2x M.2 slots (one PCIe 4.0 x4 and one PCIe 3.0 x4) with M.2 Shield Frozr for thermal protection. Storage options include 6x SATA 6Gb/s ports with RAID support. Networking features Realtek 8111H Gigabit LAN controller, while rear I/O offers USB 3.2 Gen1 (Type-A and Type-C) and USB 2.0 ports. The motherboard features a simplified black PCB design with extended heatsink solution, Core Boost technology for optimized power delivery, and BIOS Flashback+ for easy updates. Audio is handled by Realtek ALC892 codec with premium audio capacitors, and the board includes multiple fan headers with smart fan control for efficient cooling.