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BUT, 'sensors viewer' is reading something: "ACPI v zones" and displays a thermal_zone0 and thermal_zone1 are showing a realiztic looking 38C. I also installed xsensors, psensor, neither of which were able to locate a temperature sensor either. I tried to install fancontrol as part of lm-sensors but lm-sensors returned that there were no sensors installed, which prevented fancontrol or pwmconfig from running. (Pine64 sold a small 12V fan made for the rockpro64 board, but there doesnt seem to be an explanation on how to turn it on or enable the pins.) Could it possibly be part of or an extension of the pi-2 bus?Ģ. I feel like I am missing something fairly basic, but I havent been able to find another source for this information.ġ. I have a couple of extra questions regarding fan control. You also can use the 4pin 12V socket for Fan but this si always on.

This is a PWM control fan port and speed can be controlled by software.

There is a 2 Pin 12V fan port at the Pi2 bus. When I checked the voltage on the connector labelled FAN, there is no voltage.Ĭurrently I am taking the 12 volts from the 4 pin socket behind the power socket. If you really want to run your CPU without fan, I suggest you to check that the heat sink is clean (without dust on it) and the thermal conducting paste is properly applied between the CPU and the heat sink.Įven more, though, I suggest you to just buy another fan. I do not know how much old is your computer, but probably the last consumer CPUs that could be safely used with just a passive heat sink were Intel Pentium, maybe Pentium 2, and AMDs of the same epoch, which is now really old. Of course, as other have already said, this expose your CPU to permanent damage. At next reboot your BIOS may complain that the fan is not working (it does so in order to protect the CPU from overheating), but in this case you can probably disable the check. If you really want to stop the fan, you should probably just open the computer and detach the cable connecting the fan to the motherboard. There is probably no way to stop the CPU fan from software, especially if you use an old computer.