Ah, right. You've already got it, that's a bit different. It came out well before the corsair one which has supplanted it, so it was a wiser choice when the H50 didn't exist. It does well with P45 dual cores, I don't know how the i5 quads compare in terms of heat load.
I can't help wondering if your q8200 was thermally limited though, what temperatures was it hitting?