[quote=Goat_]I'd asume that the PSU is still full of dust on the inside, if you don't have warranty on that thing anymore then just open it up and really clean it, if you just cleaned the fan of the PSU and it helped a little, I'd think that cleaning the whole damn PSU would suffice[/quote]

I opened the PSU and cleaned it as much as I could without canned air. It didn't help.