MSI B550M-A PRO Motherboard AMD Ryzen AM4 2x DIMM Slots (Max 64GB) 1x PCI-e 4.0 1x HDMI DVI 1x M.2 4x SATA3 6x USB 3.2 Gen 1 6x USB 2.0 SOCKET AMD Socket AM4 CHIPSET AMD® B550 Chipset MEMORY CHANNEL Dual DIMM SLOTS 2 MAX MEMORY (GB) 64 PCI-E X16 1 PCI-E GEN Gen4 / Gen3 PCI-E X1 1 SATAIII 4 M.2 SLOT 1 RAID 0/1/10 TPM (HEADER) 1 USB 3.2 PORTS (FRONT) 2(Gen 1, Type A) USB 3.2 PORTS (REAR) 4(Gen 1, Type A) USB 2.0 PORTS (FRONT) 4 USB 2.0 PORTS (REAR) 2 (Type A) SERIAL PORTS(FRONT) 1 AUDIO PORTS (REAR) Realtek® ALC892/ALC897 Codec DVI-D 1 HDMI 1 DIRECTX 12 CPU SUPPORT Support for Windows® 10 64-bit FORM FACTOR MATX