I have to admit,my c2d e6600 + asus p5b-deluxe is awesome. Playing cs:source as a test, everything up max. Even on large multiplayer maps, its smooth as you like. Where before the game could get a tiny bit jerky on large maps with large amount of users (25+), it dont now. I used to get told that this was becuase of the limitation of the network..pfft b0ll0x.
I havent even overclocked. running at 2.4ghz. im well chuffed. I wonder how Halo 2 will perform now