super silent

Worked very well but you have to be careful if using the rubber pull-through mounts. The fan control is by way of interchangeable wire power links.

absolute silence

I needed a way to cool the hard drives in my media centre and still keep it reasonably quite, I added 4 in total 2 of these and 2 of the bigger brothers 90mm for me the noise in my system hasnt even changed, I can still only here the processor fan. The filters are very efficient the ultra low filter is blindingly quiet, most boards have on-board control these days however the filters give you control if this isnt in your bios. The silicone mounts are nothing short of genus. well worth the money if you dont want to spend a huge lump on water cooling.