Heatsinks for modern processors are slowly getting bigger and bigger, in fact many are too big to fit in a standard case. There is an obvious limit on the amount of metal that you can strap to your core before limitations creep in (motherboard component conflict, case size, weight etc.).
As a result Thermalright have come up with the IFX-14 (Infernal Fire
eXtinguisher) which not only supports up to a 14cm fan, but also a backplate cooler. Interesting, but does it actually affect the all-important silicon temperature?