Very useful information here for users who may not understand what all the Core 2 Duo hoopla is all about. I used these charts to compare the Athlon X2 3800 (which I will be upgrading to before the year is out) with the Core 2 Duo 6400, and based on what I'm seeing, the difference aint all that great. Certainly, not great enough to justify the purchase of a new mobo, RAM, and CPU. Oh, and the X2 3800 is $163 US.Nuff said.