Orion O6: Fan speed, when is the fan off, disable CPU cores?

Hi,

In your experience when the Orion O6 has a low load, does the fan switch off altogether?

Or is it possible to configure the fan to switch off altogether under certain temperatures e.g. when the CPU is below 50C.

When idling, what temperatures do the O6’s sensors show?

Which temperature sensor(s) decide the fan speed?

Can you force the fan on/off via some Linux tool?

I guess if you just disconnect the fan altogether on the motherboard, the O6 will work OK, just that it will speed-throttle if the CPU would hit 80C.

To make the O6 develop less heat in the first place (and thus the CPU will throttle never or more rarely), is it possible to disable CPU cores number #5, #6, #7 and #8?

The TDP of the Cix CD8180 SoC is 30W. The RAM adds a few more watts. Comparing to other computers this is a relatively low wattage, so cooling and quite silent cooling should be quite easy to achieve.

It would be nice to learn how the throttling typically works - like grinding to a halt, or just down-clocking.

Thanks!

I have an Orion 06N with the standard CPU fan. But I've noticed that it's too loud and I'm thinking of replacing it with a Noctua NH-L9i Intel LGA1200 & LGA115x fan. What do you recommend? Would it work with this fan model?
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You can set the fan speed, I’m doing it on mine:

echo 15 > /sys/class/hwmon/hwmon1/pwm1

However it automatically changes when the temperature changes, and you will need to change it again. I started to have a look at the CIX P1 thermal cooling doc, and it seems to me that it’s possible to separately set each PWM value for the various temperature points, but I have not dug deeper for now.