B550 Pro4 Supports 3rd Gen AMD AM4 Ryzen? / Future AMD Ryzen?, 4 x DDR4 4733+ (OC), 1 x HDMI, 1 x D-Sub, 6 SATA3, 1 Hyper M.2 (PCIe Gen4 x4), 1 M.2 (PCIe Gen3 x2 & SATA3), 2 USB 3.2 Gen2 (Rear Type A+C), 6 USB 3.2 Gen1 (2 Front, 4 Rear), ATX