Looks like sheer size and the brutal force of 6 heat pipes is the magic behind the Cooler Master H612. The cooler was not intended for small cases but performance was the primary idea behind this design. The H612 features a 120mm fan with a clip on retention clip. The package also comes with a second set of clips and screws to enable a second fan to be installed in the rear of the cooler. This will further enhance the cooling characteristic and ability of this cooler.
FULL STORY @ TECHREACTION (http://www.techreaction.net/2011/09/14/review-cooler-master-h612pwm/)