http://anandtech.com/bench/default.aspx?p=102&p2=47
The best and easiest place to compare new and old cpu's.
I used this before I made my build and it helped alot.
very nice find! i am going to use this from now on.
I just wish I could find the same thing for GPU's. I know GPU review you can compare specs but not benchmarks :/
used that to pick out my graphic cards (as well as a few other websites i cant remember) they dont have the 58xx series, but im sure they have thoes on the website somewhere.
edit: benchmarking starts on p3 and ends on p28. they cover alot of graphic cards, even though its mainly on the 4890's