Is Mac Pro 1,1 64 bit capable?

Discussion in 'Mac Pro' started by MrLatte23, Aug 7, 2009.

  1. MrLatte23 macrumors regular

    Joined:
    Jul 18, 2007
    #1
    Trying to figure out if a Mac Pro 1,1 - 2 X 2.66 GHz - Dual-Core Intel Xeon (2 Processors - 4 cores) will utilize the 64-bit benefit of Snow Leopard.
     
  2. Dr.Pants macrumors 65816

    Dr.Pants

    Joined:
    Jan 8, 2009
    #2
    Discussed already - use Mroogle. ((Google Mroogle :p))

    The answer, methinks, was yes - there might be something a tidbit interesting about the boot ROM, but it wasn't anything consequential IMO.
     
  3. iToaster macrumors 68000

    iToaster

    Joined:
    May 3, 2007
    Location:
    In front of my MacBook Pro
    #3
    They're 64 bit Xeons, so they should be fine.
     
  4. MrLatte23 thread starter macrumors regular

    Joined:
    Jul 18, 2007
    #4
    Dual-Core vs. Core 2 Duo...

    I've seen that Core 2 Duo processors are 64-bit capable, so I guess my question is are dual-core and core 2 duo the same? But if the computer listed above is 64-bit capable then this question too is moot.

    Thanks.
     
  5. gugucom macrumors 68020

    gugucom

    Joined:
    May 21, 2009
    Location:
    Munich, Germany
    #5
    As Dr Pants said they have not updated the firmware to EFI64. Appel is so anal about that. As a result they will run 64bit apps but may not run 64-bit kernel.
     
  6. bozz2006 macrumors 68030

    bozz2006

    Joined:
    Aug 24, 2007
    Location:
    Minnesota
    #6
    right. the 64 bit kernel is the million dollar question. but the kernel will conceivably load before EFI and may not be affected at all by the 32 bit EFI. we'll have to wait and see. but, yeah, search. I brought this question up a month or so ago, and there's a ton of good info in that thread.
     
  7. bozz2006 macrumors 68030

    bozz2006

    Joined:
    Aug 24, 2007
    Location:
    Minnesota
  8. OZMP macrumors 6502

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    Feb 18, 2008
  9. Infrared macrumors 68000

    Infrared

    Joined:
    Mar 28, 2007
    #9
    It's the EFI firmware that loads the operating system (including the
    kernel). That the firmware is 32-bit won't necessarily preclude the
    use of a 64-bit kernel. After all, many machines have a 16-bit BIOS
    and yet are perfectly capable of running 64-bit Windows or Linux.
    Everything depends on how Apple have gone about this.
     
  10. Dr.Pants macrumors 65816

    Dr.Pants

    Joined:
    Jan 8, 2009
    #10
    Well, a question about this - what is the exact benefit of a 64-bit kernel?

    What springs to mind for me is that compilers will churn out less code (getting a 64-bit app to work with a 32-bit kernel). The other thing is that tasks that depend heavily on kernel_task for their work won't be limited by the amount of RAM kernel_task (or other OS routines) can page.

    Are there any other upsides? Downsides?
     

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