Summary: I owned two of these prior and bought a few more to vent my cabinet. I combined it with a thermostat to turn off and on when the cabinet was on. My older fans were much louder and these are quiet enough that I no longer hear them even if they are on when there is not any noise in the house.
Summary: The power supply fan makes way more noise, and it is a high end quiet power supply. The only issue is that the different resistor cables to control speed are not labeled. You need to go online to find out what the colors mean.
Summary: If you care about fans in your computer, then this is a great choice. If you are saying "WTF would someone spend that much on a fan when I can just crank up the audio?" then save your money for the next release of Call of Duty: Modern Warfare 3 .
Summary: I was expecting quite a bit from these Noctuas after their high general praise and decent reviews on hardware sites. Plus, their high price meant that they should be a premium product that performs decently right? I was fairly dissapointed though at the airflow this thing puts out.
Summary: I'm not a computer geek but I guess I should get more info before purchase,... but this fan came out way to big for my pc. - But as item reviews are great and my pc use 3 fans 2 are different brand the one on the processor is noctua and it really is very quite it silence!!