Just recently purchased a diamond 6970 2GB . I can say , yes this makes a BIG difference.. Also combined with the mods from the following thread.

http://forum.1cpublishing.eu/showthr...ad.php?t=21048

You'l see at least 50-60 FPS non stop.. 30FPS over london.

I just ordered an Asus EAH6950/2DI2S/2GD5 today, now I have just pray that it'll work with my prehistoric board as it got only pci-e 1.0...