ok well the computer did restart while rendering before i got home. dont know when but it was just once. im going to start the fishy screensaver when i go to bed and see what happened. 

I did notice, possibly, it being alittle faster after i installed the PSU. i opened vue6 and my scene and it just seemed like the little preview window was quicker.

i have alot of "baked on" dust on my motherboard, that could be a, the, one of the bigger problems right? im gonna try cleaning it with a air can and a brush later.