z77 slot32GB. Expansion Slots. PCI Slots, 1 xPCI Express 3.0 *2.0 x16 slot (x16 mode) 1 xPCI Express 2.0 x16 slot (maximum x4 mode, compatible withSpecifications ; Chipset, - Intel® Z77 ; System Memory ; Supported DIMM Quantity, - 4 x 240-pin DDR3 DIMM slots - Support up to 32GB, un