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Thread: Power supply air flow

  1. #1
    Join Date
    Nov 2009
    Beans
    2

    Question Power supply air flow

    Hello everyone,

    I'm considering moving the PSU to the bottom of the case I'm building, but I'm not sure there is enough space for proper air intake.

    It draws with a 140-mm fan, and there will be a gap along the bottom of the case about 1/8" high, figure a total of about 40 inches in length on this gap, for a total of about 5 square inches of inlet space.

    Two questions: Will this be enough inlet space to allow proper air flow for the PSU? Assuming it IS enough space, will the narrow constriction make it sound like a wind tunnel?

    I can make the gap wider if needed, but I wanted to get some input from those with more knowledge of air flow than I.

    Thanks!!

  2. #2
    Join Date
    Aug 2009
    Location
    Brisbane
    Beans
    3,779

    Re: Power supply air flow

    I'd flip the PSU over, so its still drawing air from inside the case.

    That amount of clearance (1/8'' or 3.5mm) is nowhere near enough IMO.

  3. #3
    Join Date
    Oct 2006
    Location
    Milton Keynes, UK
    Beans
    1,141
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Power supply air flow

    My server box has a 1200mm fan in the bottom of the case pushing air in.
    The case is about an 300mm from the floor. The big problem with this is it pulls a lot of dust in. The fan blades get caked with a layer of dust. I have to clean it out every 6 or so months.
    So in my opinion keep all air intakes away from the floor !!
    Linux Registered User #443947 Ubuntu Regestered User #12604

    Hakunamatata ...... No worries !

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