Noctua NH-C12P SE14
 

Noctua has taken the high performance NH-C12P, which already offers excellent performance, and added a 140 mm fan. Noise level are still at a minimum and push the envelope in silent high performance cooling for modern processors. They all say size matters - let's see if that holds true with the NH-C12P SE14 as well. http://www.techpowerup.com/reviews/Noctua/NH-C12P_SE14