CPU Clock Speed Problem

[Dav3]

I would appreciate if anyone could help me out here. While checking system info, it is showing as in the picture. I am wondering why the speeds of each core are not the same.

Here's the screenshot of the system info:

http://www.acesgraphics.com/MAK .jpg

Thanks for helping.

 

[pdc76]

that's a single core chip, and it's called speed step or something, it downclocks your cpu when it's not in use.