ASRock EATX (Extended ATX) DDR4 Motherboards X99 WS Socket 2011-v3 Chipset: Intel X99 Memory: 8x DDR4-3200+(OC)/2933+(OC)/2800(OC)/2400(OC)/2133/1866/1600/1333/1066,Quad-Channel, Non-ECC, Unbuffered, Max Capacity up to 128GB Slots: 5x PCI-Express 3.0 x16 Slots (run at x16 or x16/x16 or x8/x8/x16 or x8/x8/x8/x8), 1x PCI-Express 2.0 x16 Slot (runs at x4) LAN: Intel I217LM and Intel I210AT Gigabit Ethernet Controllers Ports: 6x USB 3.0 Ports (4 rear, 2 via header); 8x USB 2.0 Ports (4 rear, 4 via headers); 1x PS/2 Keyboard/Mouse Combo Port,1x Optical S/PDIF Out, 1x eSATA Port, 2x RJ45 LAN Ports,Audio I/O Jacks Form Factor: EATX