Recently my system keeps freezing randomly. I cannot pinpoint the problem. At first I thought it was HD with the bad SATA connections. But the system registers them at the beginning and i don't think it can cause a freeze-up unless it's the primary HD. Might be the RAM, but i ran memtest and it came out good as well, i'll probably do it again. Then the PSU, i had it for 5 years now. It might be the problem? Next is the OS. I'll probably run a diagnostic if its any of the software that is causing the problem. I really don't know guys, any suggestions?