The average noise is high at both voltage inputs. We will find out why below.
Fan Noise & Speed Maps @ 28-32 °C
[115V] The unit’s fan starts above 1000 RPM, with 25-30 dBA noise. There is no semi-passive operation in this PSU out of fear that this could shorten the life of the primary FETs, most likely. This leads to increased noise, though, even at light loads. At around 600W, the unit’s fan exceeds 30 dBA and shortly exceeds 35 dBA. With more than 680W, you will be treated with more than 40 dBA of noise, and at 750W and higher loads, the noise goes over 45 dBA, with a minor load on the minor rails.