z77 slot1 x PCI Express x16 slot, running at x16 (PCIEX16) * For optimum performance, if only one PCI Express graphics card is to be installed, be sureSpecifications ; Chipset, - Intel® Z77 ; System Memory ; Supported DIMM Quantity, - 4 x 240-pin DDR3 DIMM slots - Support up to 32GB, un