Gigabyte Intel LGA 2011-3 X99 4way SLI/CrossFireX 4 DIMMs ATX Motherboards GA-X99-UD3 LGA 2011-v3 Chipset: Intel X99 Memory: 4x DDR4-3000(OC)/ 2800(OC)/ 2666(OC)/ 2400(OC)/ 2133 DIMM Slots,Quad-Channel, Non-ECC, Max Capacity up to 32GB Slots: 4x PCI-Express 3.0 x16 Slots (two run at x8), 3x PCI-Express 2.0 x1 Slots, 1x M.2 Slot(M.2 Wi-Fi) Audio: Realtek ALC1150 7.1-Channel High Definition Audio CODEC, Support for S/PDIF Out LAN: Integrated Intel Gigabit Ethernet Controller Socket: LGA 2011-3 4 way SLI/CrossFireX 8 USB 3.0, 8 USB 2.0 Socket: LGA 2011-3 4 way SLI/CrossFireX 8usb3.0 8 usb2.0