The Madshrimps show you what performance increase a 4ghz workstation has over a "slow" 3ghz one! Here's a snip.

We take a brand new Pentium 4 3ghz with a 800Mhz FSB, put it into the ASUS P4C800 and hook it all up to a Prometeia system. How does it perform in everyday applications? Find out in this article on future CPU power