This thing is quiet..
I use an apevia fan on my cooler master hyper 212 plus, in a pull configuration. I replaced it today with the corsair sp120 quiet edition and i can barely hear this fan even when i was closely listening for it.My pc has become a lot quieter compared to it was before. With the old apevia fan, which had high cfm, it was very audible. Sp120 quiet fan keeps my cpu temps exactly the same as my other fan, with a lot less noise.Apevia fan specs:type: case fanrpm: 1700±10% rpmair flow: 63.85 cfmnoise level: 29.67 dbai really only bought for the green led because i have a green (low-profile) color theme going. The only thing that glows was that one fan so it stood out nicely. So i decided to trade that out for a quieter fan, because that apevia fan was loud.After installation, i couldn't be happier. My gaming pc no longer sounds like an air conditioner. I highly recommend it if you are looking for a good fan for your cpu cooler, and you want that low-profile quiet 'n cool.Cheers.Update: i'm still using the corsair air series sp120 quiet edition. Temps still check out fan, running low rpm, lower cfm than the fan i was using before, and the temps are exactly the same still, at around 30*c idle, and it never goes above 55*c under full load.While my pc is idle, i barely can hear my pc.. I wouldn't even be able to tell if it was on if it weren't for the red power indicator lights on my pc tower. Keep in mind, i have extremely sensitive hearing. Jokingly, my friends call me a wolf, haha.I'm sure you could do a push/pull configuration (2 corsair sp120 quiet fans)on a hsf similar to a hyper 212 plus or evo and it will still be quiet compared to other generic fans. Keep in mind, brands like corsair air series and cougar have rubberized design to reduce vibration and noise (db). If you use a generic fan, it'll vibrate and make higher decibel level.