Question System 4 shows zero RPM ?

if your BIOS or your motherboard manufacturer's control software has a "Fan Tuning" or "Optimize" feature, run that.
it should determine your fans' minimum and maximum RPMs and fill in the blanks.
your board probably can't properly determine the fan's RPM for some reason.

also check in the BIOS if it\they are set to Auto, DC, or PWM and change if necessary.
 

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