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Thread: USing M2ATX without mobo

  1. #1
    Constant Bitrate FockMasterDan's Avatar
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    USing M2ATX without mobo

    I've got a M2ATX that I just want to power my accessories. I've searched and read but haven't found an answer about if there is anything I have to do for that or if it is/isn't possible. Thanks.
    Computer is in the car, but in a very "raw" install right now.

    Worklog - here

  2. #2
    FLAC
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    Short the green wire with ground?

  3. #3
    Constant Bitrate FockMasterDan's Avatar
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    You don't sound too confident about that. Can we get a second opinion?
    Computer is in the car, but in a very "raw" install right now.

    Worklog - here

  4. #4
    FLAC
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    Well with any ATX spec power supply, when you short the green wire to black, it turns the power supply on. However due to design, when you do this with an ATX supply you also have to put a small load (5 watt+) on the 5v rails or else it will burn up (or something like that) if you run it without a load. Not sure how the M2 is designed though.

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  6. #6
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by nobb View Post
    Well with any ATX spec power supply, when you short the green wire to black, it turns the power supply on.
    It's not always green wire to black. It's pins 13 & 14. Some wiring harnesses don't follow the common wire color conventions.
    Pin 13 is the trigger line.
    Pin 14 is a ground.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  7. #7
    Constant Bitrate FockMasterDan's Avatar
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    Quote Originally Posted by DarquePervert View Post
    It's not always green wire to black. It's pins 13 & 14. Some wiring harnesses don't follow the common wire color conventions.
    Pin 13 is the trigger line.
    Pin 14 is a ground.
    Thanks, so just to clarify 100 percent what should I wire to the trigger line? Are you saying those two pins are just what I have to short together?

    Sorry for asking to be spoon fed this answer, but I've seen so much info on damaging your M2 by wiring it wrong.
    Also any input on needing to feed it 5V to keep it from burning itself up? That seems kind of ridiculous as the M2 is supposed to be fed only 12V power in the first place.
    Computer is in the car, but in a very "raw" install right now.

    Worklog - here

  8. #8
    FLAC
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    No, I meant that with atx switchmode supplies, they always need some sort of load when powered on or else it may damage itself. Just something to consider if you plan on powering it up without a mobo attached. I dont know if that applies to the m2 though.

  9. #9
    Constant Bitrate FockMasterDan's Avatar
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    Quote Originally Posted by nobb View Post
    No, I meant that with atx switchmode supplies, they always need some sort of load when powered on or else it may damage itself. Just something to consider if you plan on powering it up without a mobo attached. I dont know if that applies to the m2 though.
    On that note which wire is for the 5V power to the mobo. I could use that for any 5V accessories I may be running (I'm sure there will be something).
    Computer is in the car, but in a very "raw" install right now.

    Worklog - here

  10. #10
    Low Bitrate
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    I use a standalone m1-atx to power my lcd, hubs, and a couple of other devices. Ive had this setup for well over a year and have yet to encounter any problems. Like darque said, I just jumpered pin 13 to 14.

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