Automatic fan control CPU

[Jeffo]

Are fan speeds to cool the CPU an automatic system? i.e higher temp = higher rpm? If so how does this work? I know there is a temperature sensor on the CPU, the output for this is a voltage, does this mean the output is filtered and amplified and then fed to the fan through the motherboard? more volts higher speed?

Just need to understand how this feedback system works

 

[KlausST]

Hi,

Why not simply do an internet search for "cpu fan control"?
Then it immediately is clear, that it is no analog speed control, but digital.
... and that it is no hardware control, but software control...or at least software configurable temperature control.

Klaus