I just finished making this chart and I am going to post it before I go home. Once I am at home I will add some explanation of the chart here.
The average overclock for the GeForce cards I gathered from a previous chart I made when the 8600 reviews went up. The shader clock for the 8600 cards was not increased because reviewers and users (that's us) are not allowed to increase the clock speed of the shader prcoessor yet.





Senior Member
Also , why does the HD 2600 XT GDDR3 core "OCs" 100 less than the reference core ?
Doesn't make any sense whatsoever .