Phanteks (PH-F120T30_BG_3P) T30-120 Fan Triple-Pack, Premium high-Performance Fan, Excellent Sound Quality, 4-pin PWM, Multiple Fan RPM Modes, Black/Grey

This is the best 120mm fan on the market - not much else to say.

These fans are great as intake case fans or fir a radiator. While they might be a bit loud at 3000rpm, its not nearly the noise level of the indistrial 3000rpm noctua fan. Static pressure is great thanks to the thicker fan blades and I expect they will last quite some time with their magnetic levitation bearing.

i used these fans to install on a gpu. its slightly over 4 slots now lol. performs way better than Noctua nf-a12s did. the only problem i had is with the plastic fan power connector/jumper right next to fan shroud. it gets in the way around tight places. i made it work though. i really want to use these on an cpu air cooler. you cant since they are 30mm. the thin metal clamping piece other cooler manufactures give you only fit the 25mm fans. i hope somebody creates those metal clips that will work. moves a ton of air. i cant wait for a 140mm version. best 120mm fans i know of.