hwmonitor just displays that my 3 fans are moving at max speed and if i try in speedfan it doesnot regulate their rpm
can only 4 pin ventilators be regulated?
3 Pins are required to regulate a PWM controlled fan. 2 pins can be used for voltage controlled fans but this is less efficient than PWM. 4 pins are necessary to get an accurate readback of the fan speed (as opposed to an approximation).
The exact implementation of fan control varies by motherboard. You may find that some software simply doesn't work on some motherboards. If this is the case, check the motherboard manufacturer's website for a firmware update to see if one is available, and/or a utility provided by the motherboard manufacturer.