GPU problem

[Mohamed Azzoni]

I bought a new gpu gtx 660 and i have a 450w psu so it might be underpowered, it was working fine until i played some games that use 90%+ of the gpu so it causes no display, when it causes no display i smell a little bit of burning i noticed its from the 6 pin cable that is connected to the gpu, its completely burnt so i tried to fix the cable and the gpu is causing no display and the fan is spinning so fast which is not normal speed, is the gpu fried or do i just buy another cable? I hope you can help me

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