how-to block ads
First off we have the regular male molex end connector. This pin number and color relationship are the same whether it's a male or female connector. The connectors are designed (keyed) so they only fit together one way, which prevents you from damaging your hardware.
Next we have the fan connector. Note the red wire is 12V+ and black is ground.
To run your fans at 7V (12V-5V) simply run the red fan wire to the 12V pin of the molex connector and the black to the 5V pin as shown below.
Enjoy your quiet fans!
Images from bleedingedge.com