GIGABYTE GA-X99-UD3P (rev. 1.0) LGA 2011-v3 Intel X99 SATA 6Gb/s USB 3.0 ATX Intel Motherboard Memory Standard: DDR4 3333*(*O.C.)/ 3200*/ 3000*/ 2800*/ 2666*/ 2400*/ 2133 Number of Memory Slots: 4×288pin Audio Chipset: Realtek ALC1150 PCI Express 3.0 x16: 2 x PCI Express x16 slots, running at x16 (PCIE_1, PCIE_2) * For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIE_1 slot; if you are installing two PCI Express graphics cards, it is recommended that you install them in the PCIE_1 and PCIE_2 slots. 2 x PCI Express x16 slots, running at x8 (PCIE_3, PCIE_4) * The PCIE_4 slot shares bandwidth with the PCIE_1 slot. When the PCIE_4 slot is populated, the PCIE_1 slot will operate at up to x8 mode. * When an i7-5820K CPU is installed, the PCIE_2 slot operates at up to x8 mode and the PCIE_3 operates at up to x4 mode. (All PCI Express x16 slots conform to PCI Express 3.0 standar...