Shoutbox

Core 2 Duos have two cores in them, so basically you'll get two 2.67GHz processors running in parallel.

e.g
User runs a video conversion on a 3.4GHz processor; it takes 30 minutes, but he can't do anything else whilst running the conversion because his CPU load is at 99%.

User2 runs a video conversion on a 2.6GHz Core 2 Duo; it takes 40 minutes, and he can do everything else he wants to do because Core1 is running at 99% and the other one is free to run whatever he wants.