Note: Dual motherboards do not support CPUs starting with E5-16XX (V1, V2, V3). This is because the CPU cannot form a dual CPU system. Support: a combination of the same model of CPU or a combination of different models but the same number of cores. Not supported: Mixed use of different core numbers, for example: 4 cores + 6 cores cannot be mixed, 6 cores + 8 cores cannot be mixedDual CPU driver, 7+7 phase power supply, large dual heat sink. X79 chip, four channel DDR3 memory, all solid state capacitor, dual PCI-E graphics card. Integrated chip sound card/net-work card, main chipset X79, integrated RTL8111H network card.CPU platform, CPU socket LGA 2011, supports 2 CPUs at the same time. Memory type DDR3 1866/1600/1333/1066MHz, memory slot 4xDDR3 DIMM. 2x8Pin power suppy interface, 1x24Pin power supply interface.Expansion Slot: PCI-E slot 2 x PCI-E X16 graphics slot; PCI-E slot 3xPCI-E X2; 2x USB3.0 pins; 6x USB2.0 pins (3 groups); 2xSATA3.0 interface; 4xSATA2.0 interface; 1xNVME M.2 interfaceI/O Interface: PS/2 interface PS/2 keyboard and mouse universal interface; 1xRJ45 net-work interface; 6xUSB 3.0 interface; 2xUSB 2.0 interface; AUX portItem Type: X79 Dual CPU MotherboardMainboard Type: ATXGraphics Card Slot: PCI-E 3.0 16X dual interfaceExpansion Slot: 7+7 power supplyCPU Slot: 7.1 channelCPU Type: LGA2011x2Memory Slot: DDR3 4 slot 4 channelMemory Capacity Peak: 32Gx4 DDR3Memory Speed: 1866/1600/1333/1066SATA Interface: SATA3.0x2 SATA2.0x4USB Interface: USB3.0x2 USB2.0x12(including expansion)M.2 Interface: PCIE X4 3.0 NVMEDue to different batches of productions, there might be some difference between the pictures you've seen and the motherboard you get, for example, retail boxes, colors of DIMM slots, SATA ports, PCI or PCI-E Slots and other ports, are subject to change without prior notice. Does not affect the use.Application: DesktopUsage Scenario: GamingUsage Scenario: HouseholdUsage Scenario: Officecolor:BlackMaterial:PCBsize:281 x 255mmPackage Contents:1 x Motherboard1 x SATA Cable(random color and random appearance, cannot select specified color and appearance)1 x Switch Cable(random color, cannot select specified color)1 x Baffle(random color and random appearance, cannot select specified color and appearance)1 x Thermal Grease(random color and random appearance, cannot select specified color and appearance)1 x Thermal Pad(random color and random appearance, cannot select specified color and appearance)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.