DEEPCOOL Gamer Storm Assassin CPU Heatsink Review @ RWLabs
 

The DEEPCOOL ASSASSIN heatsink is designed for extreme overclockers that want the best thermal performance from an air-cooled heatsink. Just looking at the ASSASSIN you know it is going to be efficient, because this thing is a behemoth with dimensions of 5.5 x 5 x 6.2 inches

http://www.rwlabs.com/article.php?id=837