Cooling Red LED PWM Fan

Discussion in 'Hardware' started by Moyo2k, 26 Sep 2009.

  1. Moyo2k

    Moyo2k AMD Fanboy

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    Need a RED LED PWN fan to replace fan on a HSF, anyone seen any, all I've seen are blue
     
    Moyo2k, 26 Sep 2009
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  2. Krikkit

    Krikkit All glory to the hypnotoad! Super Moderator

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    Size?
     
    Krikkit, 26 Sep 2009
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  3. Moyo2k

    Moyo2k AMD Fanboy

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    Ahh sorry 120mm
     
    Moyo2k, 27 Sep 2009
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  4. Moyo2k

    Moyo2k AMD Fanboy

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    It seems the only ones are Blue LED, and even those are rare, what does the 4th pin give me over 3 pins anyway?
     
    Moyo2k, 27 Sep 2009
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  5. Krikkit

    Krikkit All glory to the hypnotoad! Super Moderator

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    The 4-pin ones have a slightly different method of PWM to normal. The 4th pin gets a lower voltage fed to it to use as the lower voltage in the PWM cycle, to avoid having a 12V-0V step.

    Apparently it avoids any vibration from the fan spinning up, slowing and idling with such a big voltage difference.
     
    Krikkit, 27 Sep 2009
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  6. Moyo2k

    Moyo2k AMD Fanboy

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    Interesting, has this ever been tested?
     
    Moyo2k, 27 Sep 2009
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  7. Krikkit

    Krikkit All glory to the hypnotoad! Super Moderator

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    What, the vibration? I doubt it, but I can see why it'd be an issue on fans which aren't properly secured. I'd just stick with 3 pin tbh.
     
    Krikkit, 27 Sep 2009
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