Low fps at 3.5ghz

[Scorcher]

I am getting around 25 fps in new super mario brothers on my phenom II 3.5ghz cpu and ati 4850. I'm using build 4725 x64 on win7. I have tried both opengl and dx9 and enable/disable multicore. Other user have reported that they are getting neat 60 fps on systems like mine, what am I doing wrong?

[Apostacious]

use EFB copy to texture