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Thread: Restart loop

  1. #11
    Maximum Bitrate DeltaFX's Avatar
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    Tss tss tss... okay an EP-8KTA2 is a full ATX KT133A athlon (socket A-462) motherboard....
    that probably draws cpu power from the 5V line

    And a M2 is rated for 8A Max (peak 12A < 60s) on the 5V...

    Now let's consider this
    http://mysite.verizon.net/pchardware...ec_pentium.htm

    What do we learn there : any cpu stronger than a duron (morgan) 950 will suck dry the 5V rail just for itself.
    Now Galileo is real. Muhahahahaha :p

  2. #12
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    thanks for your help, and yes i am a noob...duh thats why im asking

  3. #13
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    If it sucks dry the 5 volt rail shouldnt there be a drop in voltage? Cause there is none. Also the board is only drawing 5 amps max throughout the whole restarting cycle.

  4. #14
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    ive put a meter on all of the pins of the m2 and checked it against the original psu. everything is the same except the white wire, on the psu its giving a -5v on the m2 its giving me nothing. Ive read that after 2002 or so the use of that wire was dropped or not necessary. The mother board im using is older than that so it must need it. I supplemented power to that line, -5v while i used the m2 to power the rest of the board and it had no effect. Things are really starting to get frustrating.

  5. #15
    Maximum Bitrate DeltaFX's Avatar
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    Voltage drop, maybe not, but certainly ripples. you checked with an oscilloscope ?

    Your mobo is aging, so regulators / capacitor may be out of spec, and having hard time to smooth power grid. I don't know the TDP of your graphic card, but it needs power for sure. And kbd, mouse, tsk need 5V.
    Now Galileo is real. Muhahahahaha :p

  6. #16
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    yea, I wondered about that but the only ocilliscope i have is from the 60's...was my dads. Not sure if it still works. Im at the point where I should just get another power supply. Do you think me getting a bigger power supply would suffice or do i need to scrap this board and start with something else? Money is tight so id like to just sell this m2 and spend a little more and get a more powerful one. What do you think? And what about the lack of that -5v line?

  7. #17
    Maximum Bitrate DeltaFX's Avatar
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    I said oscilloscope because a simple multimeter is not fast enough to detect pikes. Your system roughly need 5 A on the 5V rails, but could draw 10 A for a tenth of a sec, and you wouldn't see it with your multimeter.

    I don't know if the -5v line is a problem. Carefully remove the pin from the ATX male plug of your regular PSU, and try your mobo. If it still boot, the -5 line is not a problem. If not, well, you've figured it out.

    What CPU do you use ?
    Now Galileo is real. Muhahahahaha :p

  8. #18
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    Thanks for the help, im at the point where i dont think its worth foolin with anymore. Im workin too hard to get this old motherboard to work when i could get a single core atom for under 100 bucks. And that works with the m2. Ive just hooked it up via inverter for now so i can use it on my road trip tomorrow. Thanks for your help though, i may try that last suggestion when i get back before I order the new board.

  9. #19
    Maximum Bitrate DeltaFX's Avatar
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    Sounds wise.
    Now Galileo is real. Muhahahahaha :p

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