PWM Fan Noise
Just started the final details of my build….
Hooked up axial flow fan to the FAN1 set for PWM control. Fan works fine but horrible noise when not at 100%.
If I change the PWM value to something like 500 (seems to be the default for the online configurator) do I go higher or lower to possibly get the fan to quite down?
DjDemonD last edited by
I would have thought trying a few settings would quickly determine the answer. My 120mm fan on my water cooler needed PWM frequency at 50 to be throttled back from 100% speed at all. Trial and error I suspect is the answer as fans are all different.
I tried going from 500 down to 250, didn't seem to make a difference in the noise. I guess since the micro controller directly handles each PWM output, I was going to try upwards but didn't want to go too high (wondering what the upper limit might be).
Try reducing the PWM frequency to 100. But some fans just don't work well with PWM at all.
Thanks! F100 worked fine.
I guess I didn't want to burn anything up search for an acceptable range.