Hey guys, I have mentioned this in another topic before. But It went away when I re-installed Windows again, but now it keeps on automatically shutting down completely when playing any games for like 20-30 minutes and BOOM shut down e.g. Crysis and G.R.I.D... My load tempreatures for the GPU + CPU + Memory + MOBO are never above 55 degrees either... So it is not over heating... I'm thinking its my PSU? It's a Colors-IT 600W one... It's a very very old PSU (3-4 years old) used by my brother, but gave it to me for my new PC upgrade. Specs for the PSU are in the link http://www.digitalpromo.co.uk/color...u-pfc-12cm-fan-204pin-sata-retail-p-3496.html If it is the PSU? What one should I get? Are OCZ stealthxstream and gamexstream PSU good? They are the price range I'm looking into if my PSU is causing all these problems.