My power supply died so i pulled out a PSU from one of my older system. Its an ATX PSU but has not P4 connector. I know what a P4 connector is, I know what its for. When I go to boot up my system my video card acts as if its dead (the fan on the heat sink which is connected though the board on the card works though). I was wondering if not having a P4 connector would cause this or is my video card dead?