![]() ![]() ![]() I have seen some 4 pin molex adapters that can accomplish similar, but generally speaking, you want "full control" that would be with a 4 pin not a 3 pin (all motherboards. There is either a turn dial style (Potentiometer) or resistor style (premanent voltage reducer, which some fans include as an adapter in the box) some cases have included on them similar switches/dials and such that use either and/or 3 / 4 pin. As others have said, for 3 pin RPM control you basically need a resistor of type to reduce voltage which slows fan down, I personally know of no mobo that has 3 pin fan header that you can RPM adjust like you can "easily" do with 4 pins. ![]()
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