Specification Z77A

z77 slotThe Z77 Extreme4 expansion slot area features one PCI-e X16, one PCI-e X8, two PCI-e X1, and two PCI slots. A single graphics card will operate at X16 speeds, but two cards1 x PCI Express x16 slot, running at x16 (PCIEX16) * For optimum performance, if only one PCI Express graphics card is to be installed, be sure