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PSU boots for 1 sec then turns off

Last response: in Components
December 29, 2010 5:20:24 PM

Hi i just installed an EVGA SR-2 1200w power supply into my comp the first time i booted it up worked fine but then went back and connected my hardrive it would constantly turn on and off even though mobo lights were on.

Specs* Asus P7P55D-E-DELUXE mobo
640gb western digital
GTX 460 1gb sli
Intel Core I5 750

More about : psu boots sec turns

a b ) Power supply
December 29, 2010 6:52:48 PM

weird...recheck your connections
a c 121 ) Power supply
December 29, 2010 7:00:47 PM

That suggests a short somewhere. See if the problem only occurs when that particular hard drive is connected.
Make sure you didn't plug an 8-pin PCIE power cable into the CPU power connector.