MB MSI B550-A PRO, AM4, ATX, 4x DDR4, AMD B550, 36mj (7C56-002R)

Socket CPU (Max Support) Chipset DDR4 Memory Memory Channel DIMM Slots Max Memory (GB) PCI-E x16 PCI-E Gen PCI-E x1 SATAIII M.2 Slot RAID TPM (header) LAN USB 3.2 ports (Front) USB 3.2 ports (Rear) USB 2.0 ports (Front) USB 2.0 ports (Rear) Serial ports(Front) Audio ports (Rear) DisplayPort HDMI DirectX Form Factor CrossFire Operating System AM4 RYZEN 9 AMD® B550 Chipset 1866/ 2133/ 2400/ 2667/ 2800/ 2933/ 3000/ 3066/ 3200/ 3466/ 3600/ 3733/ 3866/ 4000/ 4133/ 4266/ 4400 + Mhz by JEDEC and A-XMP OC MODE Dual 4 128 2 Gen4 / Gen3 2 6 2 0/1/10 1 1x Realtek® RTL8111H Gigabit LAN 1(Gen 1, Type C), 2(Gen 1, Type A) 1(Gen 2, Type C), 1(Gen 2, Type A), 2(Gen 1, Type A) 4 4 1 6 HD audio connectors 1 1 12 ATX Y Support for Windows® 10 64-bit