Noctua NF-A14 iPPC-2000, Heavy Duty Cooling Fan, 3-Pin, 2000 RPM

I have a strong breeze coming out of the back of my case. I can actually feel it a few feet away! My internal temps are much lower, GPU and CPU run cooler, and the noise level isn't bad. They just make a little white noise at 85% speed, which seems to be just right for my PC. At full speed, they are a bit louder and whine a bit. It made no difference for me running 85 or 100% temp wise. These really move a lot of air.There is no wobbling and the fan is perfectly centered. The build quality is sturdy and flawless. This is the best high speed fan I ever received. They might not be your number 1 choice for a quiet pc, but the noise level isn't terrible either. Worth it

I used two of these 140mm industrial fans for perhaps a somewhat uncommon purpose. I am using these fans as gable vent fans in my plastic 11'x11' storage shed. My Lifetime shed has a vent built into each gable end. I have a 50W solar roof panel connected to a charge controller and a 12v deep cycle battery, and this battery powers my two fans set in series, through a digital 12v thermostat. I mounted the fans inside the shed directly in front of each gable vent opening, arranging them such that one fan (on the north shaded side of the shed) draws slightly cooler outside air into the shed, and the fan at the other end of the shed (on the hotter, sunnier south side) expels hot air inside the shed outward. This push-pull arrangement seems to maximize air movement and cooling effect inside the shed. These fans are super efficient, only drawing about 1/3 amp each. They are very high RPM, efficient little air-movers, and they are surprisingly pretty quiet considering how fast they spin and move air. I wasn't concerned about noise in my shed, but nevertheless, I was pleased with the relative low noise they produce. With the weather-sealed bearing arrangement on these fans, I will have no concern about any dust or moisture effect in my outdoor setting. My single 12v battery being charged by my one 50W solar panel is able to stay fully charged even when these fans run as much as 16-18 hours per day in the heat of the summer. I love these fans! They are super fast, super efficient, relatively quiet air-movers.

I bought these fans for my server PC, they work as expected. With the fan size. Of course they will be a little noisy but for what I was using them for I don’t really care for the noise. Other than that they have worked flawlessly with keeping the temperatures of the computer low

these things move some air at full tilt. they also make some noise at that speed. the fan control I use makes it easy to choose whether I want low noise or cooler temps. the material seems very sturdy. now to see how it stands up to prolonged usage.