Since they are controlled individually they can run at different speeds. You can always change your fan curve in px1 to a more desirable curve or you can set them manually to make sure they are all controllable and will reach max rpms if needed. If you switch your bios over to oc position that will eliminate the 0 rpm fan speed.

sparetimepc
Since they are controlled individually they can run at different speeds. You can always change your fan curve in px1 to a more desirable curve or you can set them manually to make sure they are all controllable and will reach max rpms if needed. If you switch your bios over to oc position that will eliminate the 0 rpm fan speed.

Look at my screenshot. When I have all 3 set to 20% only one is running. When I have all 3 set to 51% then one is running at 51% and the other two at 30%.