ASUS PRIME B550-PLUS AMD B550 ATX Motherboard (ASUS PRIME B550-PLUS) - AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors Processors, Memory: 4x Dual Channel DDR4 DIMM Slot, Max. 128GB, DDR4 4600MHz, Expansion Slots: 1xPCIe 4.0x16 (x16 mode), 1x PCIe 3.0x16, 3xPCIe3.0x1, Storage: 1xM.2 Socket 3(PCIE 4.0x4 and SATA modes), 1 x M.2 Socket 3(PCIE 3.0 x4 and SATA modes), 4 x SATA 6Gb/s ports, Operating System: Windows 10 64-bit, Form Factor: 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm ), Onboard VGA Output Available: 1x HDMI + 1x DP