AMD 64 X2 4600, Foxcon mobo, 2 x 1gb DDR2, Antec 400watt PSU, Nvidia 7600GT 256mb, Silverstone case. This computer is having problems. After running perfectly for two months when I was playing a game of Tetris it suddenly shut down, I restarted it and when the bar on the splash page was going across it shut down again. I restarted it and went into the BIOS and the temperature was 68c, so I changed the HSF(Foxcon standard one) for a Coolermaster one which I used on the previous board. After running Ok for about an hour I tried Tetris again and after about half an hour of playing it shut down again. I then reset the BIOS to defaults and no difference, the temperature in the BIOS seems to be about 10c above what Everest & PCWizard say. I then changed the graphics card from a 7600GT PCI-e to a PCI 32mb card (as it was the only spare I had and it seems to have cured the problem, but the graphics are crap. I checked for a BIOS update, but seem to have the latest, can anyone shed any light on what might be causing this, as I have no hair left to pull out.