To change your fan speeds to slower speed use one these settings in the configurations, more options. depending on how yours is wired, one will give you fastest fan speed and the other the slowest fan speed.
--avalon-fan 80-80
--avalon-fan 20-20
Mtnminer
Hi,
I received my bitmines today, they work form 1h and fan1 and fan2 have still 3360 RPMS, Temp id 21 degree, hoe to set this fans slowest ?

best regards