1.6/1.8/2.0GHz G5 CPU daughtercard swaps?

Discussion in 'Macintosh Computers' started by oingoboingo, Nov 1, 2003.

  1. macrumors 6502a

    oingoboingo

    Joined:
    Jul 31, 2003
    Location:
    Sydney, Australia
    #1
    Hi,

    I was thinking about this the other day...does anyone know of any information on the web about people swapping G5 CPU daughtercards between different speed grade systems? If someone had access to 1.6, 1.8 and 2.0GHz systems it might be an interesting experiment to perform, and would certainly answer questions about the long-term upgradability of the system. I haven't been able to find anything by Googling around the place. Seems like an obvious experiment to try if you were daring...
     
  2. macrumors 6502a

    Rezet

    Joined:
    Apr 21, 2003
    Location:
    Connecticut, United States of America
    #2
    I'm not even gonna open a sidecover of my G5 without a good reason...
    :D :D :D
     
  3. macrumors 65816

    G5orbust

    Joined:
    Jun 14, 2002
    #3
    Well, I guess in theory it could be done with the single proc versions. The G5 uses daughter cards, so I would assume that it could be done in the same fashion as the G4 cards. But, one would have to have firmware upgrades that go along with the chip to make the cooling fan spin faster in accordance with the higher clock.


    Picture of G5 daughtercard, courtasy of ChaosMint.com

    [​IMG]
     
  4. macrumors member

    Joined:
    Oct 12, 2003
    #4
    The cooling fans spin based on temperature, not based on what kind of chip you have.
     
  5. macrumors 603

    Dont Hurt Me

    Joined:
    Dec 21, 2002
    Location:
    Yahooville S.C.
    #5
    thanks for the picture, that one heck of a card!
     
  6. macrumors 65816

    tpjunkie

    Joined:
    Nov 24, 2002
    Location:
    NYC
    #6
    the fans are also controlled by the OS anyway, so no firmware update would be needed
     
  7. macrumors 604

    iJon

    Joined:
    Feb 7, 2002
    #7
    what about the front side bus. does it resign on the daughter card or the mobo itself. i have this odd feeling that it may be easier said than done.

    iJon
     
  8. macrumors 68020

    Dreadnought

    Joined:
    Jul 22, 2002
    Location:
    Almere, The Netherlands
    #8
    I think we will see it soon enough on xlr8yourmac.com. I think they are itching to get their hands on a couple of G5's they can overclock or use them for this kind of experiments!
     
  9. Moderator emeritus

    robbieduncan

    Joined:
    Jul 24, 2002
    Location:
    London
    #9
    Sort of both. There is a high speed bus form the daughter card to the motherboard so the traces are on the board. And the RAM bus which operates at 50% of CPU speed is also on the motherboard. You could hope that the 1.8 boards scale to 2.0Ghz (the 1.6 systems use a different motherboard so may well not scale that well).
     

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