One more question:   The minimum fan percentage that my installation of the controller firmware defaulted to was 100%.   The mini-documentation beside the field on the page says the default value is 10% but it burnt into my controller with 100%.

So my fans my on 4 841 miners run full blast constantly, even on these cool nights where chip temps are in the 50/60C range.  Should I change it to the default so I will get variable fan control?  Or did Canaan realize these 841s need 100% fan all the time?

Thanks again!