CPU Core speed

[Axelion]

Hello, I have intel core 2 duo e8200 that suppose to run at 2.66ghz
But when I check my core speed in cpu-z, it only shows that the core runs at 1993.8 Mhz.
Is that normal? What can I do to fix it?

 

[Axelion]

Best answer selected by Axelion.

 

[xaira]

http://www.tomshardware.com/forum/277716-28-showing-correct-speeds