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Thread: Quick question about CPU Fan voltage..

  1. #1
    Raw Wave tbird2340's Avatar
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    Quick question about CPU Fan voltage..

    I want to add some cooling to my carputer and I had some case fans laying around.. They are all 12V but I just measured the output on the wire coming from my EPIA M10000 and it's 5V. Are there any 5V fans out there? I couldn't find any at svc.com.

    If I use a 12V fan will it be OK? I know it will spin slower but will it damage anything?

    Thanks
    Current Vehicle: 2007 Dodge Nitro

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  2. #2
    Banned eatyummypuppies's Avatar
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    Five volts may not reliably start the fan, but other than that, it won't damage anything.

  3. #3
    Raw Wave tbird2340's Avatar
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    Are there fans that move some good air that run off 5V?
    Current Vehicle: 2007 Dodge Nitro

    Second Vehicle: Sold it :( 2005 Dodge Ram 1500 Quad Cab

    First Vehicle: 2003 Ford Ranger

  4. #4
    Constant Bitrate
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    just get the 12v from the hd cable. if the mb needs a fan connected to run, take the yellow wire from the fan, and connect it to the mb header w. another fan connector.

  5. #5
    Variable Bitrate 4u2n's Avatar
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    Quote Originally Posted by tbird2340
    I want to add some cooling to my carputer and I had some case fans laying around.. They are all 12V but I just measured the output on the wire coming from my EPIA M10000 and it's 5V. Are there any 5V fans out there? I couldn't find any at svc.com.

    If I use a 12V fan will it be OK? I know it will spin slower but will it damage anything?

    Thanks
    You can take a 12V fan and take the power from the disk connector

    If you think it run to fast you can move the ground from the fan to 5v then the fan only get 7v, must of 12v fan can run at 7v and do not make as much noise.
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  6. #6
    Variable Bitrate Fox_Mulder's Avatar
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    I think the fan will draw more current at 5v than at 12v. Is this true? I think it is...
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  7. #7
    MySQL Error MatrixPC's Avatar
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    Just hook up that 12V fan to the car power. I don't think you are going to burn the fan. It just spin faster and more noise. All my cooling fans are hooking up directly to the car ACC wires.
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  8. #8
    Raw Wave tbird2340's Avatar
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    What do you have the ground wires hooked up to?
    Current Vehicle: 2007 Dodge Nitro

    Second Vehicle: Sold it :( 2005 Dodge Ram 1500 Quad Cab

    First Vehicle: 2003 Ford Ranger

  9. #9
    MySQL Error MatrixPC's Avatar
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    Ground can be connect to the ground wire that going to your PSU/mobo or any ground point on your car.
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
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