Supports two M.2 storage protocols,Supports fast conversion between NVME M.2 and SATA M.2,When switching to NVME M.2, the read speed is up to 32Gbps/s, and SATA M.2 is 22Gbps/s. Powerful core,support E5 2678 V3/E5 2629 V3/E5 2649 V3/ E52676 V3/E5 2673 V3/E5 2666 V3/E5 2630 V3/E5 2640 V3/E5 2650 V3... Super power supply,Adopting 6-phase power supply combination and all solid-state capacitors, the equipment has a long service life and durability. Dual channel,Supports 2133MHz/2400MHz/2666MHz memory. Full of materials,The size of the PCB circuit board is increased, the layout of special components and wires is reasonable, the impedance is increased, the heat dissipation is faster, and the product life is increased. Motherboard model:X99-PR9 Motherboard Specifications and dimensions:FlexATX 215mm x 185mm CPU socket:LGA 2011-3 SATA interface:SATA 3.0*3 Rear USB:USB 2.0*6/USB 3.0*2 Front USB:USB 3.0/USB 2.0 fan pin:4 pins*2 Graphics card slot:PCI E X16*1/PCIE X1*1 PCB thickness:4 layer PCB Power supply interface:24-pin motherboard power supply/8-pin CPU power supply PS/2 interface:2 PS/2 mouse and keyboard ports memory frequency:2133/2400/2666Mhz The product appearance and printed words may vary depending on the batch, but this does not affect use. Colour:As Shown Material:PCB Package Contents: 1 * motherboard 1 * baffle 1 * cable