Features: Supports for Intel LGA2011-3 platform processors. Extended Inderface: 2x M.2 2280 NVME PCIEX4 3.0 32Gb/s；4x USB2.0；2x USB3.0；1x networks interface； 1x 3-hole audional interface. Four DDR3 memory slots, up to 128GB, support four channels to release more powerful performances. 6x SATA3.0 hard disk interface, 1x PCIE3.0x16; 1x PCIE3.0x4; 1x PCIE2.0x1, to meet your various expansion need. On board M.2 high-speed transmission interface x2 supports NVME protocol M.2, and feels the charm of fast and stable transmission. Specifications: Material: Printed Circuit Board Size: Approx. 245x190mm/9.64x7.48inch Model: HUANANZHI X99-QD3 CPU Socket: Supports for Intel LGA2011-3 Chipset: Q87/Z87 Series Ｍemory Socket: 4x DDR3, 4 Channel Memory Slot Mainboard Architecture: M-ATX Memory Capacity: up to 128GB(4x32G) M.2 Interface: M.2 NVMEx2 Memory Specification: DDR3 1333/1600/1866MHz Sound Card: Realtek-HiFi Audio-sound SATA-Interface: 6x SATA3.0 6Gb/s interface Networks Interface: Gigabit-Ethernet USB Port：4x USB2.0；2x USB3.0 Expansion Slots: 1x PCIE3.0x16; 1x PCIE3.0x4; 1x PCIE2.0x1 Processor Series: e5 2666 2673 2678v3 Fan Interface: 2x CPU_Fan + 1x SYS_Fan Power Interface：24pin+8pin PCB-Layer: 6-layer PCB，6Phases power supply Package Includes: 1 Piece X99 QD3 Motherboard note: Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Please allow slight chromatic aberration due to different display resolutions.