Noctua NH-U12 and NH-U9 CPU Heatsinks
 

Both coolers feature four dual heat-pipes through 38 aluminum cooling fins mounted to a copper base, all soldered for maximum thermal convectivity. The NH-U9 is designed to be used with 80mm and 92mm fans; the NH-U12 with 120mm fans. Both coolers can mount two fans at once and are compatible with Intel Socket 478, LGA 775, and AMD K8. Both of these coolers are quite large: the NH-U9 has over 3,800 square centimeters of surface area and the NH-U12 has over 5,000