be quiet! Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099

These are lovely fans. Super high quality, clearly well built, and I can’t hear them at all when set on low speed.

There is a switch on the front of the fan that limits the speedd

Forget about basically any other 140mm out there, this is the one to get. If you have the budget to afford these, get them. You absolutely will not be disappointed. The amount of air these things move is insane but what's even more impressive is the noise level. Dead silent at 1k rpm, barely audible up to 1,600 rpm, and extremely tolerable at full tilt. These things also have insane build quality. It is a HEFTY fan and feels super premium. Even the cable is sleeved with a plastic connector and a be quiet logo! The additional accessories included in box are also very welcome. Seriously, this is basically the best performing 140mm fan out there right now. The fact that no other major competitor (Noctua, Phanteks) don't have a competitor for this, makes this a no brainer!

I love it. 140mm case fan with the best performance.

Bought this fan to populate the front panel of my Fractal Design meshify 2 as the fans that come installed doesn’t move a lot of air. The quality of these fans are top notch and can easily mark them as the best 140 mm fans period. At higher rpm they become audible but not noisy. I’ve installed two of these and I’m quite happy with the performance and cpu temps are under control idling at 35 plus degrees Celsius. Versatile fan , can be used for many purposes with special removable corner brackets. Has a switch that limits the full speed. Build quality is great and the 4 pin connector is very nice, but can be difficult to route in small holes. Cable is very flexible.