NH-U12 - "Thanks to the 4 Dual-Heat-Pipes, 38 aluminium cooling fins with a total surface area of more than 5000cm² and soldered joints for optimal heat-transfer, the Noctua NH-U12 achieves superior cooling performance with a 120mm fan of your choice - no matter whether used for super-silent or ultra-high-performance cooling!"

NF-S12 - "Sound-optimised blade geometry and profile: The NF-S12 is the first fan employing a novel rotor which was developed by the Austrian Institute for Heat-Transmission and Fan Technology (Österreichisches Institut für Wärmeübertragung und Ventilatorentechnik, ÖIWV). Thanks to the special optimisation of the blade geometry towards ultra low noise application, the NF-S12 is up to 10% more quiet than current high-end fans at the same flow rate."