Computer keeys turning off

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Joined
5 Sep 2013
Posts
374
Location
UK
So whenever i plug in a graphic card into my computer , my computer will randomly make my screen go black, it wont shut off or anything , my screen will go black and then i would have to restart it, however if i use the om board graphic card on my motherboard works fine. I just tried an old gtx card and it crashed , i then plugged it into the on board one and the screen kept on saying no signal found, i left it for 10 mins came back and the on board has been working fine now. Anyone know what i could do? Is it the motherboard ? or the psu?

spec
msi z87-g45
corsair 750w

I think its very time i install like drivers for my gtx 770 card it keeps turning off, i have reformatted and then just tried to install the drivers again to make sure but still nothing, could it be the way i install the drivers for my motherboard on the CD first and then the drivers for graphic card that its breaking down somehow?
 
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