Hi Guys...newbie here, and not techy experienced! My desktop has developed a strange habit of shutting down...but only when I'm gaming. Otherwise it runs like a dream even on heavy programs like Photoshop. My tower shuts down but the power supply is still on at my keyboard. If I unplug my tower from the mains and then plug it right back in it will start up and run happily again no sweat....until I play a game. It's not overclocked or anything advanced. System spec is Pentium 4/3.4 GHz/1 GB RAM/GeCube Radeon X1300/512 MB/CD + DVD RW. I have had to replace the PSU when the original one went bang, but I got the same spec (I think). Many thanks, in advance for any help/advice/guidance