This returns anywhere from 257Mhz to 4500Mhz for my cpu. If you check their database listings on their web site of CPU speeds, you will see they are all over the place - many of the speeds are impossible.
Price: Free Trial ($9.95)
The software developer responded to this review on Jan 03, 2010:
Your comments are a little too vague for me to really value the validity. For instance, what IS your CPU? Which web listings are all over the place? Which speeds are impossible? Please try to be more specific, rather than generalizing in a non-helpful manner.