MSI B550-A PRO ATX Motherboard Key Features ATX Motherboard AMD AM4 Socket with AMD B550 Chipset Supports DDR4 Memory up to 3200MHz Supports PCIe Gen4 6 SATA III Slots, 2 M.2 Slot 3 Year Warranty with MSI Overview Introducing the B550-A PRO Motherboard from MSI. The MSI B550-A PRO motherboard supports the 3rd Gen AMD Ryzen processors with the addition of PCIe 4.0 technology for eye watering speeds. MSI PRO series lets you work smarter by delivering an efficient and productive experience. With six SATA III slots and two M.2 slots, you have so many storage options. Featuring stable functionality and high-quality assembly, the MSI B550-A Pro motherboard provides not only optimized professional workflows but also less troubleshooting and longevity. Specifications Form Factor ATX Socket AMD AM4 Socket Chipset AMD B550 Chipset Max CPU Support AMD Ryzen 5000 Series Memory Channel Dual Memory Support DDR4 Up to 3200MHz DIMM Slots 4 Max Memory 128GB PCIe Gen Gen 4 PCIe x16 2 (1 x PCIe 4.0, 1 x PCIe 3.0 x4) PCIe x1 2 (PCIe 3.0) SATA 3  6 M.2 Slots 2 (1 x PCIe 4.0, 1 x PCIe 3.0 x4) Front Ports 2 x USB 3.2, 4 x USB 2.0, 1 x USB Type-C 3.2 Rear Ports 2 x USB 3.2 Gen 1, 1 x USB 3.2 Gen 2, 4 x USB 2.0, 1 x USB Type-C 3.2, 1 x Mouse/Keyboard PS/2, 6 x HD Audio Connectors VGA Ports 0 DVI-D Ports 0 DisplayPort 1.4 1 HDMI Ports 1 Audio Chip Realtek ALC897 LAN Ports Realtek RTL8111H Gigabit LAN Operating System Windows 10 64-bit DirectX 12