Mainboard|ASROCK|AMD B550|SAM4|ATX|2xPCI-Express 3.0 1x|1xPCI-Express 3.0 16x|2xM.2|1xPCI-Express 4.0 16x|Memory DDR4|Memory slots 4|1x15pin D-sub|1xHDMI|1xUSB type C|5xUSB 3.2|1xPS/2|1xRJ45|3xAudio port|B550PRO4