Windows can be wrong with CPU speeds. as long as your BIOS and CPU-Z show 3ghz, you can be certain that it's running overclocked. try running 3dmark06, it should list your cpu and the default frequency, and then the overclocked frequency.
I think Windows is written to display the processors stock speed. It doesn't display the true clockspeed of a processor unless the processor is running at stock speed.
If the information you are getting states it is overclocked in the BIOS and in CPU-Z than the processor is overclocked in my opinion.
I think Windows is written to display the processors stock speed. It doesn't display the true clockspeed of a processor unless the processor is running at stock speed
Yeah I had a similar issue. My bios says 3.1Ghz with a multiplier of 7, yet on CPU-Z it says 2.6 with a multiplier of 6. Very odd indeed. Will try out 3dmark06 and let you know how what it says.