Noise and Fan Speed (Increased Temperatures)
The fan profile is anything else but relaxed. Seasonic used a strong fan that runs at full speed at high loads and temperatures, which makes for a very noisy PSU.
Noise and Fan Speed (~30°C)
Even at lower operating temperatures, noise output exceeds 40 dBA with loads higher than 575 W. The thermal loads are not that high, so a more relaxed fan profile wouldn't be a problem as far as the PSU's longevity is concerned.