Hello folks, I need some help with a new system that I purchased. These are the specs: P4 3.0ghz prescott chip 1MG cache - -DVD/CDRW burner -floppy -512RAM -64MB AGP Invidia grahpics card (Now) The problem is this, my nephew has been using this system for 3 months and we had no problems. Now out of no where the computer started shuting down when in the middle of something, usually playing nhl 2003. So I took it back to the store and they replaced the power supply from 350w to a 400w heavy duty one. It worked for a few days and then the same problem came back. I took it back to them and they then said it is probably the video card. So I had a 128MB ATI 9200se saphire card in the computer at the time. So I was told the card was taking too much power from the powersupply. So I was given a 64MB Nvidea card and the system worked great, for a few days. Now the computer does not shut down as often but I still have problems with it. If anyone can help that would be great. Thanks so much.