Noctua NF-A14 PWM, Premium Quiet Fan, 4-Pin (140mm, Brown)

Quiet, as advertised. Good for a general airflow fan (which was what I was looking for), but you probably want more air flow if youre looking for a fan to replace the one for your computers water cooled radiator.

I bought these after buying a couple of pairs of a high powered fans from Silverstone (FHP-141). Both pairs I recieved, while producing a great amount of airflow, were accompanied by a very loud and noticeable grinding whine at as little as 50% rated RPM. When you held the fans in your hand during operation, the reason why was clear... the rotors were imbalanced (terribly!), which to me pointed to a problem in production quality. These fans would fail within a year! (I am an engineer by trade)

Moves a good amount of air, has a 6 year warranty and is quiet now that i configured its speed in the bios. +1

These fans produce a huge amount of airflow without a ton of noise. They are the nicest fans that I have ever used. The poo brown color is not as ugly as you might think. I am currently building a PC based off of this color scheme.

Super duper.

Got two of those babies cooling a 280mm radiator. The only thing I would ever complain about is the color. Hands down the best fans on the market. The accessories that come with the fan justify the price. You get a low noise adapter, a fan splitter, vibration mounts.

Again, the Austrians know how to design and build top of the line products. I replaced all three of my case fans with these great 140mm fans. The botton line is they are near silent and cool better then my other fans. This is a great investment for the life of your computer!

So quiet I almost took my computer apart again after installing it to make sure it was on. Installation was a breeze ;).

The noisiest fan I currently have.

Bought two to replace the fans that came with the Corsair H110i CPU cooler and could not be more pleased. The difference in noise made by the fans was like night and day, the Noctua being quieter by a large margin. Instead of sounding like a vacuum cleaner at boot-up and when under heavy use, I barely hear the fans. I changed nothing but the fans: used identical settings that my motherboard identifies as the Silent profile for the CPU and CPU optional fan headers [ASUS Maximus VIII Hero] then booted it up again and thought Id messed up because it was nearly silent. I took the cover off to make sure the fans were spinning! Thats how much difference it made. I also confirmed the air flow by feel, and it seems the same as with the stock Corsair fans. Im now considering replacing the rear case fan, possibly even the front two with Noctua fans, but that is an expensive undertaking so Im going to wait a bit before committing.