On 3dmark06 I went from 3k flat cpu (AMD Phenom 550 x2, 3.8 ghz 1.41v~)
after unlocking, 3.7 ghz 1.46v 4 cores: 5k flat
In 3dmark vantage, 6700 to 11500~ (same specs as above). Im afraid I cannot located the pictures, I will look in my other HDD when I get home.
The difference is there, easily visible.
Windows 7 64 bit booting sped up by a few seconds, no FPS increase since the games I mostly play have 60 FPS limit and I havent removed that limit.
Encoding media, and rendering videos is also much faster. Overall you can easily tell the difference when you multi-task.