What's wrong with the PSU? I have heard FSP is good and if it's one of the gold series PSUs, then I know it's a great one!
Nothing wrong with it at all, it IS a great PSU, but it might be on the edge or marginal for a better GPU. I'm one of THOSE people, lol, that likes to go a little higher than absolutely necessary, on the PSU.
I don't think that particular one is a Gold Series, though.