Elle est très bien; maintenant les papst, yate loon/nexus, et scythe.  
Ma petite expérience personnelle(papst, yate loon) se retrouve parfaitement dans la description de spcr :
 
-The Papst 4412 fans are very nice when undervolted on DC current. They are one of the best quiet 120x25mm fans for restrictive environments. They don't like PWM though. Purely noise wise, they fall in the quiet, but not the most quiet category. The Nexus and Globe (and the more recent additions to this list) options are quieter, but remember, the 4412 is moving a good bit of CFM.
 
-The Nexus "Real Quiet Fans" are astounding fans in the 80mm, 92mm, and 120mm categories. They work flawlessly on PWM and undervolt on DC fairly well considering their low 12V CFM. The only potential negatives about the 120mm is its orange color, its lower 12V CFM numbers (not an issue at all for most everyone though), and price compared to the Globes. Not as good as the Papst 4412 in a restrictive environment. It's the quietest 120mm axial at the standard 12v by a significant margin and may also just be the quietest 120x25mm case fan on the market at minimum RPMs (will keep you posted).
 
-The Yate Loon D12SL-12 is used by 3R systems, the Korean company that builds most of Ahanix's cases. They can also be found in some Fortron power supplies. The Nexus 120mm is a Yate Loon under another label, only the Yate Loon spins faster than the Nexus at 12V and the Nexus's fan blade design possibly has a slighly little more curved leading edge. Unlike the orange Nexus 120mm, the Yate Loon is black. Can be rather difficult to find. Probably the ideal quiet fan as it still retains the ability to crank a bit more CFM on demand but lack the bearing/motor noise of the Globe (assuming the Yate Loon's noise charactersitics is the same as the Nexus 120 in the Nexus's RPM range).
 
-Scythe S-Flex. Makes use of "Fluid Dynamic Bearing" technology. The Scythe S-FLEX SFF21D (800rpm @ 12v stock) is the currently the best available choice for those in search of the quietest 120mm axial at standard voltage, with the Nexus now a close second in line.