bornspider Posted September 12, 2021 Share Posted September 12, 2021 Hi Could someone please help me out here. i have got a h115i pro cooler i have swapped out the standard fans for sp140 rgb pro put on the standard fan there is a 4 pin plug on the sp140s there is a 3 pin plug doe's this matter as i can not change the fan speed all i can do is the colour setting. Any help on this would me much appreciated. Many thanks in advance Link to comment Share on other sites More sharing options...
LeDoyen Posted September 12, 2021 Share Posted September 12, 2021 seems you have "dc controlled" fans, and not PWM ones. the AIO controller is a PWM controller, that's why you can't adjust fan speed. basically, DC fans have their speed controlled by varying the voltage sent to them. PWM fans receive a constant 12v and vary speed following a signal sent by the controller. So your 3 pin fans are always at full speed because... 12 volts only. If you want to control the fan speed you need to install PWM fans Link to comment Share on other sites More sharing options...
bornspider Posted September 12, 2021 Author Share Posted September 12, 2021 Thank you for the reply and i have now returned the fans and ordered some pwm one's. Once again many thanks 🙂👍 Link to comment Share on other sites More sharing options...
c-attack Posted September 12, 2021 Share Posted September 12, 2021 The other option would be to use the MB fan controller if you need to keep the DC SP-Pros on the radiator for whatever reason, but as mentioned they will be stuck at max on the PWM controller. Link to comment Share on other sites More sharing options...
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