Review on case fan be quiet! Shadow Wings 2 140mm PWM, black by Wiktor Paul ᠌

Large screws, but at the same time ergonomic. From a complete set - the fan, convenient fastenings (finally) and the instruction. I don't know what else is needed. Absolute silence at work. In standby mode, the fans run at 500-600 rpm. Under load, the speed rises to 900-1000, but only the air flow itself becomes slightly audible, no more. After setting the fans to blowing -3 degrees in a closed system unit, before installing them, there was one regular screw from the case.