My Computer Will Only Turn On With The GPU Unplugged From The Psu All of A Sudden

streetfarter

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Sep 25, 2011
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My PC was working fine untill this morning it shut down while i was asleep. When i tried to start it nothing would happen. Lights on the motherboard and the GPU are lit. After turning off and on the PSU when i hit the start button the fans turn and the leds on the fans are lit for a split second then nothing happens. However when i unplug the power cables from the GPU everything seems to work fine but i can't get any display because i don't have an onboard GPU.

My Spec;
MB: Asus P7P55D-e Pro
CPU: i5 760
GPU: nvidia gtx 660ti
PSU: Xilence 750watt (can 't remeber the exact model)

I have been using this rig for 5 years now with no issues such as this one. Can this be a PSU problem? And If so is ti normal that i can start it without the GPU?

Thanks.
 
I have tried pluggin in only one of the inputs on the graphics card and wirh one of them plugged the computer "seems to" be trying to boot and i have the exact behaviour with the other one. I made sure that the cables are both working. Maybe one of the inputs drain more power than the other? I really need to test this with another PSU.