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How does speedfan control fans

D

data5

Junior Member
Does anyone knows how speedfan is working, does it set some values in the motherboards fan controller or does it regulate fan speed by updating the speed from the running software? I have a cpu fan with 3 pin header and would like to regulate its speed based on the CPU temp in a dualboot system. The motherboard is Z97M-D3H which have pwm on cpu fan and voltage control on sys fan but I can't regulate sys fan with cpu temp in gigabytes smart fan.
 
I think it does it through WMI. At least that's my best guess 🙂.

Also, I'm pretty sure that 3 pins can only be controlled by voltage regulation.
 
Speedfan might work.

See if you can turn off all fan things in the bios, and if this allows speedfan to control the speed (of the sysfan) manually. If that works you can make a nice cpu temp/fan speed profile, and do a thing in the windows sceduling to make speedfan start with the system.
 
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