i am considering your idea about the change in speeds. the reason i am not going to make it the primary ranking is because i am hoping to make this a guide for performance for oc'ers looking for a nice oc card while still having great picture. sure you may be able to oc an older card a ton, but it still won't have the quality that a newer one does. that's just where i am coming from on that. the reason i do not want to include the 3dmark scores is because they do not indicate just the performance of the video card, but the whole computer and that isn't my point. i am not slamming your ideas, but that is just my logic beihind it.
*edit: i added another column "o/c rating". they are not put in order by that column. the way you read it is the higher the number, the better the o/c on the card. a ranking of " - " means that they did not o/c the card.*