CPU Socket: Support Intel® 2011-3 Processors Memory Socket: 4*DDR3 Memory, Maximum Memory Capacity 128G Memory Standard: Support four channel DDR4 1866/2133/2400MHz SATA Inderface: 8*SATA3.0 interface Extended Inderface: IO:1*PS/2 Mouse / keyboard interface,6*USB2.0,4*USB3.0,1*Gigabit Ethernet Card,6*3.5MM Audio interface;Expansion pin:2*9pin USB2.0,1*19pin USB3.0,1*Front audio output pin Expansion Slots: 2*PCI Express3.0X16,1*PCI ExpressX1,1*PCI ExpressX4 ,1*M.2 NVME,1*M.2 NGFF Soud Track: 5.1 Network interface: Gigabit Ethernet Power interface: 24pin+8pin Fan interface: 5 PCB layer: 10 layer PCB,6Phases power supply Dimension: 283*215MM ATX Packing list: 1*I/O baffle 2*SATA line Note: X99-AD3/AD4/BD3/BD4 motherboard size is 283mmx215mm. Not standard ATX size. Make sure your case can be installed with this motherboard.