ASRock ATXDDR4 Motherboards X99X Killer LGA 2011-v3 Chipset: Intel X99 Memory: 8x DDR4-3000+(OC)/ 2933+(OC)/ 2800(OC)/ 2400(OC)/ 2133/ 1866/ 1600/ 1333/ 1066,Quad-Channel, Non-ECC, Unbuffered,Max Capacity up to 128GB Slots: 3x PCI-Express 3.0 x16 Slots (one runs at x8), 2x PCI-Express 2.0 x1 Slot, 1x Mini-PCI Express Slot Ports: 10x USB 3.0 Ports (6 rear, 4 via headers), 7x USB 2.0 Ports (1 rear, 4 via headers, 1 Vertical Type A header, Fatal1ty Mouse Port), 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: ATX