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Thread: Testing a PSU

  1. #1
    Join Date
    Aug 2004

    Default Testing a PSU

    Is there anyway to tell if a PSU is working properly without a motherboard? I just bought an Antec Truepower 430W, but I don't have my motherboard yet. If I plugged it into the wall, will the fans turn on? How do I verify it works?

  2. #2
    Join Date
    Sep 2002
    Central Alberta , Canada

    Default Re: Testing a PSU

    Do not attempt to use your power suppy without having it hooked up to something. Can't remember who/where I was told that operating without a load is not a good thing for a PSU but it seems to me that I did trust the source. In addition to the possible risk there is the fact that just because the fans spin up does not really tell you anything about the proformance of the PSU. There are test light units that the main motherboard plug can be attached to to verify that all rails are functioning and I suppose one could find out how well the thing funtions by using a volt meter .... best bet is to leave the thing alone untill you have the system.
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  3. #3
    Join Date
    Jun 2003
    Sunderland, England

    Default Re: Testing a PSU

    i think that operating without a load was only a problem on the old at power supplys.
    to power it up without a motherboard locate the green wire on the atx plug and then stick a paperclip in it, then put the other end into one of the black wires and the psu should turn on
    <img src=" rans=yes&.jpg" alt="" />

  4. #4

    Default Re: Testing a PSU

    it is still prefered to have the PSU plugged into something, even if it's only a fan. To test it you need a decent muti-meter

  5. #5
    Join Date
    Apr 2004

    Default Re: Testing a PSU

    You either need a mainboard to test it or ground the Power On wire on the mainboard plug (pin 14 to pin 13).

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