This may not give you an apparent performance boost, but you will not regret it.
Great, thanks! Are you recommending a better PSU so I can upgrade it later? Will these parts fit in my case, or should I get a better one? I'm reading through the reviews on the mobo, and I see that quite a few people are having problems with it; is this just bad luck?
If I increased my budget to something like, say, $750, what else could I change?
EDIT: I looked for the 7870, and I can't seem to find it in stock in Canada. Any other card?