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