The world of overclocking is a relatively vast one, when you start getting into it, and it attracts many people with the promise of higher speed and bragging rights as well as the allure of gaining new life out of older hardware. An overclocker by the name of Brian McLachlan, or chew*, has set record 3DMark '06 scores, using stock AMD Phenom II X4 955 processors, using all sorts of methods ranging from air to dry ice and liquid nitrogen.
More at; http://www.neowin.net/news/main/09/05/09/overclocker-pushes-amd-phenom-ii-to-absolute-limits