What is this adapter for?

R

Ru1984

New Member
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!IMG_20210227_223945.jpgIMG_20210227_224008.jpg

IMG_20210227_223854.jpgIMG_20210227_223919.jpg
 
It's a molex to a 3 pin fan connector. Its to connect a cooling fan when there are no more motherboard fan headers to connect to.
 
As per above that just adapts 12v DC into a 3 pin DC fan without any RPM monitoring or voltage control.
 
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!
 
Ru1984 said:
would be the signal for RPM monitoring & voltage regulation correct?
Click to expand...
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.
 
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