CPU-Z for windows doesn’t work in wine on linux =( however there is an alternative!

Introducing CPU-G!

Screenshot: http://ikt.id.au/wp-content/uploads/2010/02/cpug.png

Download from:

http://sourceforge.net/projects/cpug/

Extract the .tar.gz to your chosen location, after that fire up terminal and find your way into the directory of the extracted files, run ./cpu-g and it should fire up like the screenshot above.

Great job to the author :)