i have a 700w ocz power supply and the problem is in the 24 pin atx connector. if i plug it in any board i get no display just fans spinning, but it works fine with matx boards. i tested the voltage out on every pin and its putting out fine voltages. im using another power supply's 24 pin connector and everything else is connected to my defective one, and it's powering everything fine especially a gtx 460..