No, see the little voltage switch? That's one of the older BFG PSUs, that weren't all that great. I didn't find a review of that specific model, but I did find a thread that didn't speak too kindly about it: http://hardforum.com/showthread.php?p=1033757509
The LS models are good, but not the older GS ones.
This sounds more like a driver problem though. When you removed the previous [ATi] card, did you completely remove the old drivers?