ASUS ATX DDR4 3000 (o.c.) LGA 2011 Motherboards X99-E WS LGA 2011-v3 Chipset: Intel X99 Memory: 8x DDR4-3200(OC)/ 3000(OC)/ 2800(OC)/ 2666(OC)/ 2400(OC)/ 2133 DIMM Slots,Quad-Channel, Non-ECC, Unbuffered,Max Capacity up to 64GB Slots: 7x PCI-Express 3.0/2.0 x16 Slots (run at single x16 or dual x16/x16 or triple x16/x16/x16 or quad x16/x16/x16/x16 or seven x16/x8/x8/x8/x16/x8/x8) Ports: 14x USB 3.0 Ports (10 rear, 4 at mid-board), 4x USB 2.0 Ports (4 at mid-board), 2x eSATA Ports,1x Optical S/PDIF Out, 2x RJ45 LAN Ports, Audio I/O Jacks Form Factor: CEB, 12.0 x 10.5 inch / 30.5 x 26.7 cm Supreme Power Efficiency: Premium Components deliver industry-leading power efficiency The leading IO Scalability Convenient Maintenance Tool