Micro-ATX Form Factor, AMD B550 Chipset, AMD AM4 Chipset, 4 x Dual-Channel DDR4-4800 (OC), 6 x SATA III, 2 x M.2, 1 x PCIe 4.0 x16, 2 x PCIe 3.0 x1 Slots, Realtek ALC887 7.1 Channel Audio Complement that AMD build with the Prime B550M-K AM4 Micro-ATX Motherboard from ASUS. Utilizing the B550 chipset this motherboard is compatible with AMD Ryzen Gen 3 CPUs or APUs using the AM4 socket. Install 128GB of dual-channel DDR4 RAM across four slots with speeds up to 4800 MHz supported when overclocking. Users can also install storage drives using two M.2 and four SATA III interfaces. Install a graphics card using a PCIe 4.0 x16 slot and other adapter cards can be connected using two PCIe 3.0 x1 slots.A rear I/O panel sports four USB 3.2 Gen 1 and two Gen 2 Type-A ports. A legacy mouse or keyboard can also be connected using a PS/2 combo port while displays can be attached using an HDMI DVI-D or VGA connection. An RJ45 port facilitates a Gigabit Ethernet connection. Furthermore three 3.5mm audio ports are also present on the back panel.Internal headers include a USB 3.2 Gen 1 and two USB 2.0 connectors supporting two and four Type-A ports respectively. CPU and case fan connectors are also present and SPI TPM header accommodates an optional user-installed TPM chip. Audio headers include S/PDIF and speaker connectors as well as AAFP audio connectors for front-panel ports. A clear CMOS jumper is also incorporated into the motherboard. Audio relies on the Realtek ALC887 codec supporting 7.1 Surround Sound. The ASUS Prime B550M-K AM4 Micro-ATX Motherboard is compatible with Windows 10 64-bit operating systems.