I just got my new psu and gpu today. A ocz zt 650w and gigabyte gtx 650 to boost. I plug those in thinking everything should be fine. Next thing you, no beep no display. Psu seems to power the fans and gpu. There green light on Mobo. I even tried old gpu gtx 460. Tried plunging old psu no luck. I am lost. Please help me.