MSI B550M-A PRO, AMD, Socket AM4, AMD Ryzen 3000 Series, Socket AM4, 64 GB, DDR4-SDRAM MSI B550M-A PRO. Processor manufacturer: AMD, Processor socket: Socket AM4, Compatible processor series: AMD Ryzen 3000 Series. Supported memory types: DDR4-SDRAM, Maximum internal memory: 64 GB, Memory slots type: DIMM. Supported storage drive interfaces: M.2, SATA III, Supported storage drive types: HDD & SSD, RAID levels: 0, 1, 10. Maximum resolution: 4096 x 2160 pixels. USB connector type: USB Type-A