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Thread: Can LED on fans make it spin slower?

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    Default Can LED on fans make it spin slower?

    I saw someone saying : same fan model, only with RGB and non-RGB difference, perfomance of RGB one is lower than the normal one because LEDs consume power so it affects the motor perfomance.

    Does it make sense?

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    The fan motor and the RGB lighting should be on different circuits within the fan. One should not "steal" power from the other. The fan, overall, will consume more power, of course.

    So that said, if someone sends a fixed voltage/current to the fan with the RGB lighting, it would cause the fan to spin slower because there's less power available to it. But I can't think of a single example where that would ever come into play.

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    Quote Originally Posted by jonnyGURU View Post
    The fan motor and the RGB lighting should be on different circuits within the fan. One should not "steal" power from the other. The fan, overall, will consume more power, of course.

    So that said, if someone sends a fixed voltage/current to the fan with the RGB lighting, it would cause the fan to spin slower because there's less power available to it. But I can't think of a single example where that would ever come into play.
    Thanks! Then the PWM ones will not be affected, right?

    The person I mentioned uses ML140 single color and RGB for example, that RGB ones have a lower max spec. I guess its just product target difference(radiator and system), but I wanted to make it sure...

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    Apples to apples. There's different versions out there (retail vs. radiator, etc.)

    There are different ML fans with different max RPM ratings, but that has absolutely nothing to do with lighting, etc.

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    pretty much, yes. Best way to tell if a fan has slowed down is to listen to it. If take power away from the HUE does the system still sound exactly the same? If so then they haven't changed.

    In general the RPM of fans is too high for your eyes to make out and process in any rational fashion so they will end up playing tricks on you especially if you have changing lighting conditions, and since the HUE can dim/change color of the LEDs they are going to have a slight flicker to them which is going to exacerbate the issue.

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