The average noise remains below 30 dBA at both voltage inputs I tried. This category has less noisy PSUs, but the GF A3 850W is not far from most of them.
Fan Noise & Speed Maps @ 28-32 °C
[115V] The unit’s passive operation doesn’t last long, and the load on the minor rails doesn’t seem to affect it notably. Some areas in the red field show the unit’s passive operation, where you can see the fan speeding up for short periods to remove heat. This is why most users don’t like semi-passive modes: the fan can spin high suddenly, breaking the silence and becoming annoying. For most of its operation, the PSU is within the 25-30 dBA range, while at around 640W, it gets more noisy, exceeding 30 dBA. Shortly after, with 20W more, it goes above 35 dBA.