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Thread: Turn on PSU without a mobo?

  1. #1
    Join Date
    Aug 2004
    Centreville, Virginia

    Default Turn on PSU without a mobo?

    I was wondering if theres any risk with plugging in and turning on your PSU with out it hooked up to a mobo. My mobo is coming in a week but I wanted to test/playaround with fans I have. The PSU I have is the thermaltake butterfly 480w. Thanks

    Athlon 64 3500+ at 2.4 ghz
    Thermalright XP-90
    MSI K8N Neo2 Platinum
    1 gig Crucial BallistixPC3200
    BFG 6800 Ultra OC

  2. #2
    Join Date
    Apr 2004

    Default Re: Turn on PSU without a mobo?

    You will need to bridge the pins 14 and 15 of the mainboard power connector with a piece of wire to get the PSU to turn on.
    Attached Images Attached Images Turn on PSU without a mobo?-atxmain-gif 

  3. #3
    Join Date
    Jul 2004

    Default Re: Turn on PSU without a mobo?

    Just ground the green pin with any of the black pins in the picture above, as wayout said
    All around me are familiar faces
    Worn out places, worn out faces
    Bright and early for their daily races
    Going nowhere, going nowhere

  4. #4

    Default Re: Turn on PSU without a mobo?

    I want to turn on a secondary PSU to power my x1600pro as my on board PSU isn't big enough. It is a Shuttle XPC so putting in a larger PSU is not an option. So could I splice in a take-off from the mainboard connector (pins 14 and 15) to trigger the second PSU to turn on when the shuttle does? If not, how can I go about doing what I want to do?

  5. #5
    Join Date
    Sep 2006

    Default Re: Turn on PSU without a mobo?

    I think you could do it, but there might be issues.
    I think I have a trigger plan to hook up the power button to the PSU but I am too lazy to draw one.

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