Computer Randomly Just Stopped Working?

[John Sawyer]

My newly built computer: http://pcpartpicker.com/p/pL9Y8d
has just randomly stopped. Or maybe just the gpu. The monitor went blank and I heard some buzzing sounds (btw I was wearing headphones). I was in the middle of a Youtube video if that matters. I had to turn off the power supply to get the computer to turn off (the fans and leds were still on). When I rebooted i got the American Megatrends thing telling me that it detected an unstable power supply. I think that that may have been because I turned it off but still. I managed to get it up and running again, and nothing seems wrong, but I just wanted to see if there was a fix for this or if it is a common thing or something like that. Thanks!

EDIT: The computer now just black screens for a few seconds and then starts responding again. When it does that Windows says the video driver has just started responding again. Is there any easy fix for this or am I going to have to get a new gpu?

 

[digitaldoc]

I would start by looking at your power supply as the cause of your instability. Also, make sure your graphics driver is updated to the latest.

http://www.pcadvisor.co.uk/how-to/pc-components/3432554/problems-with-pc-heres-how-check-your-power-supply/