Cinebench
What can I say. Overclocked Athlon 64's ROCK. Even at stock settings, the 4000+ beats the P4 670.
POVRay3.6
The P4 670 really shines here, beating a stock 4000+ by 20%!
The overclocked 4000+ is almost as fast, and the 2.9GHz overclocked Athlon is within 1%
POVRay 3.7b4
The P4 670 is the winner for POVRay 3.7b4 ... at least until we publish our next processor review :)