Gigabyte Intel LGA 2011-3 X99 4way SLI/CrossFireX WIFI Dual LAN Motherboards GA-X99-UD5 WIFI LGA 2011-v3 Chipset: Intel X99 Express Memory: 8x DDR4-2133/ 1866/ 1600/ 1333 DIMM Slots,Quad-Channel, Non-ECC, Max Capacity up to 64GB 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) Multi-Graphics: Support for 4-Way/ 3-Way/ 2-Way AMD CrossFire & NVIDIA SLI Technology LAN: 2 x Intel Gigabit Ethernet Controllers; Wi-Fi 802.11 a/b/g/n/ac Wireless LAN (2.4/5GHz); Bluetooth 4.0, 3.0+HS, 2.1+EDR Socket: LGA 2011-3 4 way SLI/CrossFireX 12 USB 3.0, 6 USB 2.0 Socket: LGA 2011-3 4 way SLI/CrossFireX 12 usb 3.0, 6 usb 2.0