Average Noise
The PSU’s average noise output is low, not exceeding 20 dBA.
Fan Noise & Speed Maps @ 28-32 °C – 115V
The semi-passive mode doesn’t last long, being restricted to a small region of the PSU’s operation map, with the load on the minor rails ranging from 60 to 80W and the 12V load up to around 200W. I noticed something similar in the 1200W unit, but the load at 12V increased to 240W. With an increased load on the minor rails above 90W, the fan’s speed enters the 15-20 dBA range, which is much lower than the 1200W unit, which, with a high load on the minor rails (>95W), enters the 25-30 dBA noise range.
Up to 660W at 12V, the noise output remains below 20 dBA, and the PSU’s fan never exceeds 30 dBA. Overall, the fan speed profile is much more relaxed than that of the 1200W unit.
Fan Noise & Speed Maps @ 28-32 °C – 230V
The 230V fan speed profile is identical to the 115V one.
