The Noctua NH-C14 may be the most versatile convertible CPU cooling solution around today. The Noctua NH-C14 has the ability to go from ultra-low profile and silent to a dual 140mm fan enthusiast cooler with just a couple of clips.
Standing at only 105mm tall with a bottom mounted fan, the NH-C14 can fit into almost any case. Despite its small height, the NH-C14 still has six copper heatpipes running through a 140mm square aluminum fin array, making the absolute most of a small space.
The included Low and Ultra-Low Noise Adapters throttle back the fan (or fans) to near dead silence while still maintaining excellent cooling.
Full story at HiTech Legion.