The Noctua NF-A8 80mm Fan is a high performance, low noise fan designed by the acclaimed CPU Cooler manufacturer, Noctua.
Sound-optimised blade geometry and profile:
The NF-R8 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-R8 is up to 10% more quiet than current high-end fans at the same flow rate.
Self-stabilising oil-pressure bearing (SSO bearing):
The NF-R8 series are equipped with a magnetically centred, self lubricating oil-pressure bearing that provides a new level of quietness and long-term stability.
Total Reviews: 3
Average Rating: 
Fantastic and silent
12-25-2009
Reviewer: hardwarenerd (4)
I have 2 of these fans cooling my radiator on my proc/video card and keeping temps below 50c (with a 4870x2, not an easy task) although hideously ugly, they are silent and move air nicely
Small Wonder
04-20-2009
Reviewer: Englaise (5)
I bought 5 of these to replace the 80mm fans in my 3 server cases, 2 of them Lian Li PC-76. Before, the servers each sounded like vacuum cleaners, but after replacing them with these Noctua fans, all three of them running are far quieter than just one was before. How nice to be able to hear myself think! Even in a relatively warm environment (81 F), CPU and MB temps are fine, and hard drives only luke warm after hours of continuous on-time.
High Quality Fan
01-30-2007
Reviewer: Zerobox (3)
I got 3 of these fans to lessen the noise and still provide air flow. These fans are of a very high quality build. I did not use the resistors since I have a fan controller. You almost cannot hear the fans at 5v-6v. The rubber mounts work and install great. Highly recomended if you stand the price.