http://www.xbitlabs.com/articles/cpu...4-x2-6000.html
2.93 vs 2.4 22% clock difference.
Quake 4 7.1% scaling
Unreal 17.8%
Fear 11%
MPEG 16.7%
h.264 19.2%
cinebench 23.5%
povray 21.6%

Average, 16.7% scaling out of possible 22% or 76%