PCI Express 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.
1 x PCI Express x16 slot, running at x8 (PCIE_3)
* 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 standard.)
Memory Standard: Supports 1R 2933/ 2666/ 2133 MHz*
1DPC 1R Max speed up to 4800+ MHz
1DPC 2R Max speed up to 4266+ MHz
2DPC 1R Max speed up to 4400+ MHz
2DPC 2R Max speed up to 4000+ MHz
* Please refer www.msi.com for more information on compatible memory