Magnificent 1296

I tested several brands and model fans (thank you to the Amazon return policy), with the objective, get a quiet PC, mainly to sleep while it is in working order and properly cool my PC ( i5-4670k, GTX 770)
On most fans, the engine noise is heard. The worst is when the branch to a Rhéobus to put less than 30% ventilation: engine noise unbearable (tiny "click").

With Silent Wings 2 ... That happiness. No engine noise, just the sound of the wind! We feel very good quality product manufacturing, anti-vibration mounting system without screws that works perfectly.
So we certainly, we pay almost 20 fan, but there was no defect, a high-end product, efficiency, and silent ulta, packaging more than one result: adapateur molex> 5v, 12v 7v; two types of fixing (screws, without screws) with the surplus in case of loss or breakage, manual.
I will now take more than one!