ASUS AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, 1 Gb Ethernet, HDMI/D-Sub/DVI, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB headers support AMD AM4 socket: Ready for 3rd Gen AMD Ryzen™ Processors Comprehensive cooling: VRM heatsink, PCH heatsink, and Fan Xpert 2+ Ultrafast connectivity: Dual M.2, PCIe 4.0, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A Aura Sync RGB: Onboard addressable Gen 2 header for RGB LED strips, easily synced with Aura Sync-capable hardware CPU Build in AMD AM4 Socket 3rd Gen AMD Ryzen™ Processors * Chipset AMD B550 Memory 3rd Gen AMD Ryzen™ Processors 4 x DIMM, Max. 128GB, DDR4 Graphic 1 x D-Sub 1 x DVI-D 1 x HDMI 2.1(4K@60HZ) Expansion Slots 3rd Gen AMD Ryzen™ Processors 1 x PCIe 4.0 x16 (x16 mode) AMD B550 Chipset 2 x PCIe 3.0 x1 Storage Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports Support Raid 0, 1, 10 LAN Realtek RTL8111H 1Gb Ethernet USB Ports Rear USB Port ( Total 6 ) 2 x USB 3.2 Gen 2 port(s)(2 x Type-A) 4 x USB 3.2 Gen 1 port(s)(4 x Type-A) Front USB Port ( Total 6 ) Operating System Windows® 10 64-bit Form Factor mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )