Mac Pro 3.1 mystery connector...

Discussion in 'Mac Pro' started by dannyboy3344, Jan 7, 2016.

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  1. dannyboy3344 macrumors newbie

    dannyboy3344

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    Jan 7, 2016
    #1

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  2. barbu macrumors regular

    barbu

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    #2
    intersting! i have no idea but i would guess that it is a diagnostic port used in the manufacturing/testing process. I am curious if someone actually does know. You could always ask Apple ;-)
     
  3. dannyboy3344 thread starter macrumors newbie

    dannyboy3344

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    #3
    Yeah its what I thought... was hoping for a cool rare chip add-on ;)
     
  4. mryingster macrumors regular

    mryingster

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    #4
  5. Spacedust macrumors 6502a

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    #5
    The same is in Mac Pro 4,1-5,1 - called Little Frank and Big Frank

    [​IMG]

    Must be some special Apple service connector ;)
     
  6. Lenry macrumors newbie

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    Oct 9, 2008
    #6
    Intel used to have a motherboard or some part of a motherboard they called the Zappa. Zappa'
    s estate didn't like them taking Frank's name in vain however. Maybe there is a connection, since it's right next to an intel chip.

     
  7. ScottishCaptain macrumors 6502a

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    Oct 4, 2008
    #7
    I think that's some sort of diagnostics/debugging connector for the system management controller.

    On the MP3,1 and earlier, there's only one chipset controlling the whole system. On the MP4,1 and later, there's two- one on the backplane board (the big PCB that has the PCI-e slots on it), and another located on the CPU daughter card. AFAIK, it's the same chip on both sides of the system (called the "Primary SMC" and "Secondary SMC" in the service manual), so it'd make sense that they'd be named Big Frank and Little Frank.

    -SC
     

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