Mainboard, Asus, AMD B550, SAM4, MicroATX, Memory DDR4, Memory slots 4, 2xPCI-Express 3.0 1x, 1xPCI-Express 4.0 16x, 2xM.2, 1x15pin D-sub, 1xDVI-D, 1xHDMI, 6xUSB 3.2, 1xPS/2, 1xRJ45, 3xAudio port, PRIMEB550M-A

AMD B550 | micro ATX | CPU AMD | Socket Socket AM4 | Supported memory types DDR4-SDRAM | 4xNumber of memory slots | Memory slots type DIMM | Supported storage drive interfaces M.2,SATA | 4xUSB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 2xUSB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 1xEthernet LAN (RJ-45) ports | 1xHDMI ports quantity | 1xDVI-D ports quantity | Bluetooth Yes

Warranty and RMA handling is provided by DELTA IT — you never have to contact the manufacturer or distributor separately.