MSI MEG B550 Unify-X Motherboard probably the best B550 mobo for overclocking. Features 4 (four)!!! M2. NVME slots, two of which are PCIe 4.0 the other two are PCIe 3.0. Features front panel USB-C 3.2 header. Back IO features 2 USB 3.0 ports, 3 USB 3.2 ports and 1 USB-C 3.2 port, a 2.5G Ethernet port, BIOS Flashback button and CMOS Reset Button. Also features a Power button and Reset Button on the motherboard. Has a Debug code LED Dislpay. Supports up to 64GB DDR4. AM4 socket and Ryzen 5000 series ready without needing a BIOS update. I'm selling because I switched to AM5. Motherboard has worked perfect with no scratches or anything on it. Mobo will not come in the original box.