OK, i have 2 systems i'm working on, both have pc chips m825 mobos. Both amd durons one is i believe 800mhz one is 1.6 ghz. the 800mhz system randomly shuts down, so i put the 800mhz processor in the 1.6 system, fans and everything start, but no video, i put the 1.6 in the 800 system, and it still randomly shuts down, i know that it isn't the power supply, or ram, it has to be either processor or mobo, and i think it may be both, please express your thoughts, because this really has my mind boggled. I probably left something important out, if so, just ask and i'll post it, thanks alot. oh and on a note, the 1.6 system works perfectly, i'm just using it to find out what is wrong with the 800 system