![]() This PC fan controller is compatible with three and four-pin fans. 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. Read More Key Features Controls up to 6x 3-pin DC or 4-pin PWM fans Two RGB lighting. Edit: also my board does do DC control but only on two of the three PWM channels. The 3 pin fans run at full blast even though speed fan is setting the PWM signal to a lower value. Connect the 3x 140mm pwm fans to one fan header, and the 3x 140mm non-pwm fans to another header. It just sends the PWM signal to every port. Buy 3x 140mm non-pwm fans of the same model and run all 6 in the sata powered fan hub and hook up to one mobo fan header to control voltage. 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. That’s the one I bought that doesn’t actually voltage control 3pin fans. A standard fan header has 3 pins with a gap for the tachometer. The old 3-pin fans are almost extinct, as developers embraced the 4-pin design, which allows them to configure fan speed using software (PWM control). ![]() 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. You won t get the same level of control as with a 4-pin PWM fan, but you can still plug.
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