This is my 1st post, thanks for allowing me to join! I'm just looking for some insight on this weird molex power connector adapter which I've never seen before and its use. I've attached some pictures of the adapter below, thanks in advance!
I see, so the 3rd missing pin on the fan connector would be the signal for RPM monitoring & voltage regulation correct? I appreciate the information. Thanks!
Yes on RPM, no on voltage. Most of the older fans were controlled via knobs or some physical fan controller for just decreasing DC. PWM is better/easier.