Well that is a pretty nice GPU...
I think you might be ok if you overclock but I would reccomend a high frequency quad core cpu. (Intel doesn't make triple core CPUs.)
From what I've read GPU's don't need much more than a triple core running at about 2.8Ghz - 3.0Ghz. Obviously, the faster the better.
Personally I'm running a Quad core at 3.6GHz on a much slower video card.