Why mac pro 1,1 can't run with Harpertown cpu?

Discussion in 'Mac Pro' started by Amethyst, Mar 1, 2012.

  1. Amethyst macrumors 6502a

    Aug 8, 2006
    Because Apple EFI doesn't have CPU microcode or
    it hardware doesn't support?
  2. Neodym macrumors 68000


    Jul 5, 2002
    The 5000X chipset should support the 54xx series of Xeons, so its probably a question of EFI/Firmware. There have been quite some threads about that topic - so far no success stories afaik.

    With the preview of 10.8 Mountain Lion and the official cease of support for first-gen MP's there may be renewed interest in firmware mods - maybe the Harpertown support could eventually be added by some inofficial modification (see e.g. the CPUID speculation in post #147 over at netkas).

    Question is whether it'd be worth it, as the advantages seem to be comparably small (quick google search - no idea regarding the credibility).

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