Review on ARCTIC P12 PWM PST - 120mm Computer Case Fan with Pressure-optimized Quiet Motor, White/Transparent, Fan Speed: 200-1800 RPM by Aditya ᠌

quite quiet; in a closed casing, even at maximum power, you rarely hear them. I fitted all 5 as hull twists, which greatly improved the hull's ventilation. The air within the case stayed cool throughout a prolonged stress test using a GTX 1080 + 8700K overclocked (with an usage of roughly 150 watts), and the blown air flow was likewise not overly hot. But maybe most importantly, I was happy with the noise level because, even at the maximum speed of 1900 rpm, they are really virtually inaudible.