Sometimes, or...Alot of times, my computer will go black as if the monitor has switched off, the sound goes off, and my computer makes a noise that can only be described as a louder version of its normal noises. Sometimes it comes back on and comes up with "display driver NVIDIA kernel mode driver 347.09 stopped responding and has successfully recovered" But other times it just seems to switch off, but the computer seems to still make noise? Im using a Nvidia GTX 460 and a 550watt PSU I think. Also, its seeming to happen whenever I play games for a while or go on the internet. If you need any more details feel free to ask!