RAM slot doesn't work with new RAM stick, Error 55, 4 beeps, won't
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 sureMotherboard Gaming ASRock Z77 Extreme 4 LGA1155 B75 H61. 4