Windows corespeed very odd

[jeanluclariviere]

Windows is telling me my comp is running at 3.4ghz, but I know from my OC, and CPU-Z that it's infact running at 2.7ghz. Why is that ?

 

[michiganteddybear]

more info on system, and could you post screenshots of cpu-z and windows showing speed

 

[jeanluclariviere]

MSI P35 neo2-FR
Intel Pentium E2220 (Dual Core 2.2ghz )
AC freezer 7 pro
2 x 1 GB Corsair XMS
XFX Nvidia 8800 GTS
Corsair 750watt