I got one of the noiseblocker pro fans for the bottom fan slot in my case, I don't know how it manages it but it can spin at 1300RPM and make quite a bit LESS noise than the fractal design fan I have in the case, which spins at 1000RPM max and pushes a lot less air than the 120mm noiseblocker AND makes more noise... 1300rpm 120mm noiseblocker vs 1000rpm 140mm fractal fan... pushes more air and makes less noise at 300rpm higher and 20mm smaller! The kit that comes with it is cool as well it has rubber everywhere so it makes no vibrations at all.