3-pin fans still have an RPM sensor on them, and most mainboards can still vary their speed based on temperature. 3-pin fans use simple voltage control for adjust the fan speed. 4-pin units ...

I have a P5B Deluxe in my personal box running exclusively 3-pin fans for the CPU.<BR>There'd be no point to a connector plug for the 4th pin (which is PWM control), since the fan itself has no ...

User Wing King posted images of a 12V-2x6 connector prototype on Bilibili, capable of monitoring current across each pin. The design has been developed to help monitor the current on each 12V pin ...