17 Inch MBP CPUs - 64bit?

Discussion in 'Buying Tips and Advice' started by AlthalusMB, Jan 27, 2009.

  1. AlthalusMB macrumors newbie

    Jan 27, 2009
    Hi guys,

    first time poster, Macbook user.

    I'm gonna bite the cash bullet and get the MBP 17" when they finally start shipping it, but I have one question.

    I looked at the comparison of 2.66 and 2.93 CPU's, checked them out on the intel site.

    It says that the 2.93 T9800 (the only one it could be) doesn't have Intel 64 Architecture - does this mean it is not 64-bit enabled.

    More Importantly - Does this mean it wouldn't support any of the joy that is Snow Leopards 64 Bit kernel??

    I was one of the idiots who assumed that Win XP 64bit would actually be a good thing, what a waste of money that was! But with Apple making what seems like a concentrated effort to ramp everything up to 64bit, its probably worth getting a compatible CPU.

    Anyone got any thoughts on this?

    Here are the links to the respective Intel pages for the 2.93 and 2.66.

    T9800 (No Tick by 'Intel 64 Architecture')

    P9600 (Has a Tick by Intel 64 Architecture)


    T9550 (Also has a tick)

    I don't know which the low option is.

    Anyway - don't crucify me for being a n00b, but any comment would be welcome.

    2.0Ghz Core2Duo MBP
    320Gb 7200RPM SATA HDD
  2. detz macrumors 65816

    Jun 29, 2007
    I'm might be wrong but I'm pretty sure every CoreDue2 now is 64 bit architecture.
  3. TuffLuffJimmy macrumors G3


    Apr 6, 2007
    Portland, OR
    Every Apple Laptop and desktop computer is 64-bit. They've been that way since they transitioned from CoreDuo to Core2Duo.
  4. Cheffy Dave macrumors 68030

    Cheffy Dave

    Feb 5, 2007
    Sunny Florida, on the Gulf Coast in Homosassa Fl
    Thanks for that info Jimmy,didn't know that:eek:
  5. Consultant macrumors G5


    Jun 27, 2007
    Current MBP, MB, iMac, Mac Pro, are 64bit.

    64 bit requirements
    Processor: Core 2 Duo
    Mobo: Santa Rosa
    or later

    Some Core 2 Duo are NOT 64bit
    (pre-santa-rosa, those can only recognize about 3gb of ram due to hardware)
  6. TuffLuffJimmy macrumors G3


    Apr 6, 2007
    Portland, OR
    That doesn't mean anything. They're still 64-bit, they just can't recognize more than 3GB of memory. That's more of a logicboard issue, anyway.
    Since when is 64bit decided on by how much memory you can recognize?
  7. hellfire88 macrumors 6502

    Apr 28, 2008
    I'm pretty sure the CPUs used in the new 17" MBP's are 64bit-compatible. Besides, it'd be pretty dumb of Apple if they release a brand new product in 2009, and make it no compatible with their new Snow Leopard OS to be released soon. Doesn't make sense, lol.
  8. Consultant macrumors G5


    Jun 27, 2007
    This part is easy
    Core 2 Duo: 64bit
    Core Duo: 32bit

    This part is harder to understand
    Santa Rosa or later: full 64bit
    Pre santa rosa: 32bit memory controller

    If you put a 64bit processor on a 32bit motherboard, it's limited by the bottleneck.
  9. TuffLuffJimmy macrumors G3


    Apr 6, 2007
    Portland, OR
    It's still a 64bit architecture and processor. The memory controller has nothing (other than the RAM bit) about running Snow Leopard.
  10. AlthalusMB thread starter macrumors newbie

    Jan 27, 2009

    So what is implied by it NOT having 64 ticked on the intel page, if anything?

    Either its a typo, or the Intel 64 Architecture means something else..

    Cheers for the advice guys, wanted to know before splashing out!
  11. gnasher729 macrumors P6


    Nov 25, 2005
    Oh my god this is so wrong. Lets do some maths: 32 bit addresses = 4 GB, 33 bit addresses = 8 GB, 34 bit addresses = 16 GB, 35 bit address = 32 GB etc. So you can bet that Santa Rosa does _not_ have a "full 64bit" memory controller, because 64 bit memory (16 billion GB) would be more than all the worlds RAM manufactured to date!

    64 bit vs. 32 bit has nothing, nothing at all with the amount of RAM that you have. 64 bit vs 32 bit means how much virtual memory an application (more precise: A single process) can use. Now having more memory is surely nice, and using more virtual memory that you have RAM will slow you down, but a Santa Rosa board with 3GB plugged in is the same as a Pre-Santa Rosa board with the same 3GB.

    And anyway, who says Snow Leopard doesn't run on 32 bit machines?

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