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Thread: Case fan noise!

  1. #1
    Senior Member
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    Default Case fan noise!

    I have bought a new case fan - it's cooler BUT it sounds like a vacuum cleaner (seriously)

    Runs at 2500RPM - too fast and too loud!

    I have successfully slowed it down using SpeedFan (to 40%) but I have to launch speedFan and slow it down again after a reboot.

    Is there a way I can slow it down on boot?

    Specs below.

    EDIT: Being powered by a 3-pin connector on mobo.
    Last edited by jwil1; 12-05-2008 at 02:15 PM.
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  2. #2
    Unknown Device wratterus's Avatar
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    Last edited by wratterus; 12-05-2008 at 02:28 PM.
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  3. #3
    amateur expert dugimodo's Avatar
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    Default Re: Case fan noise!

    some fans come with a small inline resistor that can be added to drop the speed, I don't know if you can buy them seperately though.

    The fan will have either a current or wattage rating so if you felt adventurous you could work out the resistance and buy a resistor to suit and insert it in the +12V wire. A 0.8A fan for example works out to about 15 ohms to half the voltage.

    A cheap fan controller is simply a variable restor with a nice front panel.
    Some more expensive ones could possibly use pulse width speed control.

    Or just buy a slower fan.

  4. #4
    amateur expert dugimodo's Avatar
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    Default Re: Case fan noise!

    p.s. some ASUS motherboards, and possible others, have an option in the Bios to control the fan speed based on temperature. ASUS call it Q-fan. Some only control the cpu fan, but mine (P5K) also slows down the case fan

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