Extereme Tech has a very informative article with price/performance comparisons at:
http://www.extremetech.com/article2/0,1697,2014685,00.asp

It is interesting to note
that Athlon 64 FX-62 (2.8 Ghz  $ 825 ) is slower than Core2 E6400 (2.13 Ghz   $ 320 )          
The data are taken from the graph of 3D Rendering Scaling (Geometric Mean) in the article.
If we believe the data, Intel is much better than AMD.

What do you think?   
Am I right ?

3D Rendering Scaling (Geometric Mean)
Core2 E6400           2.13 Ghz   $ 320      about   580 second   
Athlon 64 FX-62       2.8 Ghz    $ 825     about    620 second

The bottom graph in
http://www.extremetech.com/article2/0,1697,2014652,00.asp