SOCKET: AM4, CHIPSET: AMD B550 Chipset, MEMORY CHANNEL: Dual, DIMM SLOTS: 4, MAX MEMORY (GB): 128, PCI-E X16: 2, PCI-E X1: 2, SATAIII: 6, M.2 SLOT: 2, RAID: 0/1/10, USB 3.2 PORTS (FRONT): 1(Gen 1, Type C), 2(Gen 1, Type A), USB 3.2 PORTS (REAR): 1(Gen 2, Type C), 1(Gen 2, Type A), 2(Gen 1, Type A), USB 2.0 PORTS (FRONT): 4, USB 2.0 PORTS (REAR): 2, AUDIO PORTS (REAR): 5+ Optical S/PDIF (Realtek® ALC897 Codec). MSI conducts thorough memory testing with the most popular memory brands under extreme conditions to ensure your system runs stable no matter what.