ASUS PRIME B550M-A AM4 Micro-ATX Motherboard, Memory Support 4x DDR4 DIMM Slots (128GB, 4400 MHz O.C), Expansion Slots 1x PCIe 4.0 x16 (x16 mode) & 2x PCIe 3.0 x1, Storage Support 2x M.2 Socket 3 & 4x SATA 6Gb/s Connectors, Network Realtek RTL8111H 1Gb Ethernet, Realtek ALC887 7.1 Surround Sound High Definition Audio CODEC, Rear USB Ports 2x USB 3.2 Gen 2 & 4x USB 3.2 Gen 1, 3 Years Warranty. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximising your productivity.