I have an ISGC 300 CPU cooler. According to the specifications its fan speed ranges from 800 to 1300. I am using Open Hardware Monitor to monitor the fan speed. I have an ep43t motherboard with the F4 BIOS. According to the motherboard manual if I disable the smart fan control (SFC hereafter), then the fan works on max speed. If I enable it, then I can set to auto, PWM or voltage. If the fan has 4 pins, then PWM is the right choice, and if the has 3 pins, then voltage is the right choice. When I change the CPU fan settings in BIOS I have the following results:
- by SFC enabled and set to voltage it reaches at most 400 RPM
- by SFC disabled I have 850 RPM
- by SFC auto I have 810 RPM
I have a manual control device, with it I can set the fan speeds between 250 RPM and 730 RPM. Is there a way to reach the 1300 RPM somehow? Why can't I reach it?
Note that I constantly have CPU temperature issues, since the fan works only on 800 RPM...
According to the specification the fan uses 12V. Is there a way to measure the voltage it gets? I have a voltmeter...
I found that the fan cable has a male "2 pin molex connector" near to the 3 pin female. I am not sure what that is for.