http://www.hardocp.com/article.html?art=MTU4MCwyLCxoZW50aHVzaWE=
anandtech is the usual let down, but this one, the page before it, VERY clearly shows that the quad core C2Q and C2D are not at all remotely close to equal in not cpu limited situations, and gpu limited, not far apart if not the same, on that particular graph, the i7, in gpu limited situations is both slower than the c2d and the c2q.
Same situation shown basically across the board in reviews all over.
thats one of the better gaming reviews done. Non gpu limited, quad core of ANY kind, very much including the old quad cores gives the same performance and its massively more than a dual core, when not gpu limited. When gpu limited, you couldn't really care less what you have in there tbh, you're gpu limited, thats where you want to be.
A 4870 is cpu limited at 1280x1024, but gpu limited at 1920x1200, however, a tri sli setup is cpu limited at 4870, and at 1920x1200, its only just about gpu limited way up at the next step. If you have tri sli and are running at a low res, you simply wasted money, even there, extra frames are the unseeable e-peen type, not the, make games playable numbers.