cpu: intel e8400 3GHz (never overclocked)
ram: OCZ 2x2GB (never overclocked)
gpu: gigabyte nvidia 8600GT
motherboard: i changed the asus mobo with an Asrock x48TurboTwins (Brand New)
psu: i changed the old psu with a cooler master extreme power 650w (Brand New)
when i start the pc nothing shows up on the monitor (no signal). I tried 2 different monitors and cables and i also changed the graphics card, psu and motherboard and ram and still had the problem. I then removed the cpu and put an E6600 and the pc was ok but when i put back the E8400 the pc booted fine and my monitor showed the bios and windows but only for about 2 minutes then the pc restarted by itself and i had the same problem with monitor not getting signal from the pc. Do you think that the problem is the E8400?