Re: Computer Crash Issues...can't seem to find an answer
Power supply is suspect, but you also need to test the RAM. You could even have an overheating processor, so be sure to check the temps in the BIOS (if they're listed) or do a good 'ol manual feel of the heatsink. If you can't leave your fingers touching it for more than a minute or two, it's too hot. If the CPU is fine, grab a copy of Memtest x86 or even a copy of Hirens Boot CD (It includes MemTest and many other tools we'll suggest in the future for any other issues)
Run a full memtest on the system, I'd recommend doing it for a full run while you sit there and watch it (or at least have something to do - 8GB of RAM can take a bit) and if the system can run one pass, let it run overnight.
if the system can't run for a full pass, swap out the power supply and test again. Memtest is a minimum tool, if the system can't run a full test run of memtest, there's other problems going on.
If the PSU swap doesn't help, I'd suggest possibilities such as the motherboard, etc.