CPU Socket: Support Intel® 2011-3 Processors Memory Socket: 4DDR3 Memory, Maximum Memory Capacity 128G Memory Standard: Support four channel DDR4 1866/2133/2400MHz SATA Inderface: 8SATA3.0 interface Extended Inderface: IO:1PS/2 Mouse / keyboard interface,6USB2.0,4USB3.0,1Gigabit Ethernet Card,63.5MM Audio interface;Expansion pin:29pin USB2.0,119pin USB3.0,1Front audio output pin Expansion Slots: 2PCI Express3.0X16,1PCI ExpressX1,1PCI ExpressX4, 1M.2 NVME,1M.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: 283215MM ATX Packing list: 1I/O baffle 2SATA 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.