X99 PR8-H Motherboard Specification: LGA 2011-3 Motherboard Chipset: Intel HM55 CPU Socket: LGA 2011-v3 Memory Slot: 4 x DDR3 DIMM memory slots, support up to 128GB Support Memory Type: DDR3 800/1066/1200/1333/1600/1866/2133MHz RECC/ECC/Desktop memory. Memory Channel: Supports Dual-Channel mode Compatible Devices: Personal Computer, Keyboard, Mouse, Printer, Projector，Microphone, Monitor, Video Card, etc. Platform: Windows 8, Windows 10, Windows 11 Expansion Slots: 1 x PCIe 3.0 X16, 1x PCIe 2.0 Storage: 3 x SATA 3 Gb/s port(s), 1 x M.2 Socket (Supports SATA(NGFF)M.2 or NVME M.2) USB Ports: 8 x USB 2.0 port(s) (6 at back panel, 2 at mid-board) Back I/O Ports: 1 x PS/2keyboard/mouse port(s), 1 x LAN(RJ45) port(s), 6 x USB 2.0, 3 x Audio jack(s) Internal I/O Ports: 2 x USB 2.0 connectors, 1 x M.2 Socket (SATA/NVME M.2), 3 x SATA 3 Gb/s connectors, 2 x CPU Fan connectors (2 x 4 -pin), 1 x 5V MOS Fan connectors (1 x 2 -pin), 1 x Front audio out header, 1 x 8-pin ATX 12V Power connectors, 1 x 24-pin EATX Power connector, 1 x Front panel connector, 1 x Clear CMOS jumper (1 x 2 -pin), 1 x SPK header (1 x 4 -pin) LAN: Realtek 8111H 1000Mbps RJ45 Ethernet Audio: Realtek ALC897 chip, 2.1 Channels Power Supply: The intel x99 motherboard adopts a 6 phase power supply Applicable Hard Disk: Supports 2.5-inch SATA SSD, 3.5-inch HDD, MVME M.2 SSD, SATA M.2 SSD. Enter BIOS: Turn the computer motherboards on, and press the main "DEL" key continuously. Quick Boot Button: F7 - Turn x99 matx motherboard on, and press the F7 key continuously. M.2 Mode Switching: Supported NVME/SATA(NGFF), default is NVME M.2 RAID: Not supported Overfrequency: Not supported Size: 215mm*190mm Form Factor: M-ATX Packing List: X99 PR8-H Motherboard *1 CPU Fan Bracket *1 SATA Cable *1 I/O Shield *1