New pc build freezes and doesnt boot after?!

Today I upgraded my pc hardware. I installed new psu (Corsair vs550), motherboard (asrock 890gm pro3), cpu (phenom ii x6 1100t), gpu (gtx 660) and new ddr3 ram. I had some trouble with the wires but I managed to install them. Everything booted up fine, upgraded bios and drivers. (there was somekind of error in mobo drivers) Started playing and in the middle of the game computer freezes to black screen and i had to reboot. (temperatures were good) When i tried to reboot only psu, cd drives and hdd seemed to work. There was a light on the gpu but even the fans didnt work. I then switched ram slots and when tried to boot everything seemed to work fine but there was still a black screen. Later all the fans stopped working again. Any suggestions what would be the problem?

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Since it's dead try

Try starting over. Put the motherboard with CPU+HSF and PSU on cardboard and re-test. It should beep in protest of no RAM and GPU. At that point you can check there are no extra mounting studs in the case and see if it beeps in protest in the case (again, only need the MB+CPU+HSF and PSU.

Add a piece one by one till you find Waldo.

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What is the problem?

Ok i'll try that. Do you have any idea what caused it to freeze because it was working perfectly?

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I can't be sure.

But a common gaffe is when folk upgrade a system and reuse the case. They leave in a post and it wears through the paint on the PCB. This one is a classic and some new builders ask why it worked for a time. I can't be sure of this since you are there and I can't check it for you.

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