Feature: 1. Loaded with M.2 hard disk port,support high speed of PCI-E NVME X4.It is the best choice of operation system or application driver. 2. With 4 channels DDR3*8,improve the capacity and performance largely,support 256GB. 3. Equipped with digital diagnostic card,hardware devices will be tested automatically to ensure the operation of the devices. 4. Support 3 PCIE expanded slots,these channels can be synthesized to X16/X8 configuration to cope with multiple workloads. 5. It is made of 10 layers PCB and high quality capacitors,stable and heat-resistant. 6. With 8 SATA3.0 ports for acquiring the best reading speed,fast transmitting without waiting. Specification: Features: Loaded with M.2 hard disk port,support high speed of PCI-E NVME X4.It is the best choice of operation system or application driver. With 4 channels DDR3*8,improve the capacity and performance largely,support 256GB. Equipped with digital diagnostic card,hardware devices will be tested automatically to ensure the operation of the devices. Support 3 PCIE expanded slots,these channels can be synthesized to X16/X8 configuration to cope with multiple workloads. It is made of 10 layers PCB and high quality capacitors,stable and heat-resistant. With 8 SATA3.0 ports for acquiring the best reading speed,fast transmitting without waiting. Specification: Model: X99-8D3 Form Factor: ATX Graphic Slot: PCIE3.0 16X*3 Network Card: Gigabit Network Card Audio Channel: 7.1 Channel CPU Type: LGA2011 2629V3/2649V3/2669V3/2678V3/2696V3/2676V3/2673V3 PCB: 10 Layers Memory Slot: DDR3*8 Capacity: 256GB SATA Interface: SATA3.0*8 M.2 NVME PS/2 Interface: mouse/keyboard Power Supply: 8 PIN*1 24 PIN*1 USB Interface: USB3.0*6 USB2.0*6 Expanded Interface: PCIE 1X*2 M.2 WIFI*1 Item Size: 30.2*24.4cm/11.89*9.61in Item Weight: 930.5g/32.82oz Package Size: 35*29*6.8cm/13.78*11.42*2.68in Package Weight: 1387g/48.92oz Packing List: 1*Motherboard 1*SATA Cable 1*Baffle 1*CPU Fan Board A bag of screws Package List: 1*Motherboard 1*SATA Cable 1*Baffle 1*CPU Fan Board A bag of screws