neon neophyte said:
was going to say you need more ram, but you dont (thats what the problem sounds like)
after looking over your pc specs i say you need a better psu! put that junker on a htpc or something. (not that i think its related to your problem, just insurance for a nice system.)
Not to be rude in correcting you, PC Power and Cooling makes soem of the best PSUs on the planet. I don't think I will be changing anytime soon.