Core 2 Duo Macbook Pro 64 bit capable?

Discussion in 'MacBook Pro' started by e12a, Nov 1, 2006.

  1. e12a macrumors 68000

    e12a

    Joined:
    Oct 28, 2006
    #1
    I read that the developer notes for the macbook pro does not mention a 64 bit bus. It does for the mac pro though. Can anyone clear this up?

    i bought a c2d mbp in hopes of having 64 bit for the future.
     
  2. e12a thread starter macrumors 68000

    e12a

    Joined:
    Oct 28, 2006
    #2
    I read this in Macintouch

    here's the user's post:
    Randall Smock
    Although I remain optimistic (my C2D 17" is on order) it would appear that the laptops are not 64 bit clean.....

    from the developer guide for the Mac Pro: Processor is 64 bit capable.

    Intel Xeon Processor
    The microprocessors in the Mac Pro are Dual-Core Intel Xeon with the following features:

    two dual-core, 2.66 GHz Intel Xeon processors or configure-to-order options of two dual-core 2.0 GHz or two dual-core 3.0 GHz Intel Xeon processors
    4 MB shared L2 cache per processor
    Intel Advanced Digital Media Boost
    Connection to the North Bridge IC over a 1333 MHz frontside bus
    Supports Intel Extended Memory 64 Technology (EM64T)

    Processor has 64 bit addressing on its bus:

    The dual, independent processor buses run at 1333 MHz and connect the processors to the North Bridge. Each front-side bus has a 64-bit wide data bus. Each processor has 64-bit addressing.

    The point-to-point architecture provides each subsystem with dedicated bandwidth to main memory. The North Bridge IC implements an independent processor interface. The input clock to the processor PLL is 333 MHz.

    from the developer guide for the MacBook Pro:
    Processor is 64 bit capable.

    Intel Core 2 Duo Microprocessor
    The microprocessor in the 17-inch MacBook Pro is an Intel Core 2 Duo with a clock speed of 2.33 GHz. It has the following features:

    2.33 GHz dual core processors
    4 MB shared L2 cache
    Intel Advanced Digital Media Boost
    Connection to the North Bridge IC over a 667 MHz frontside bus
    Supports Intel 64 Architecture

    Processor has 32 bit addressing on its bus:

    Processor Bus
    The processor bus is an up-to-667 MHz bus connecting the processor to the North Bridge IC. The bus has 32-bit wide data running in both directions. The processor has 32-bit addressing.

    While Apple does discuss the C2D's ability to handle 64 bit code it appears as though the proc is willing but the motherboard isn't able.

    Anyone want to correct me I will be happy as can be but I believe Apple isn't touting this as 64 bit cause it isn't.
     
  3. mleary macrumors regular

    Joined:
    Sep 13, 2006
    #3
    Memory addressing is 32-bit which ends up limiting the system to ~3.2gb of physical ram, but the processor is 64-bit, it supports the EM64T exentions.
     
  4. e12a thread starter macrumors 68000

    e12a

    Joined:
    Oct 28, 2006
    #4
    oh okay good. I was getting nervous there. I remember someone compiling code in 64 bit so it worked. I wasnt sure though. Thanks!
     
  5. mdntcallr macrumors 65816

    mdntcallr

    Joined:
    Aug 1, 2000
    Location:
    Los Angeles, CA
    #5
    it works 64 bit, but not 100%, the rest of the system chips may need updating.
     
  6. typecase macrumors regular

    Joined:
    Feb 2, 2005
    #6
    I posted something similar in this thread. There were a few replies.

    This line in the Mac Pro specs still bothers me when comparing it to the MBP:

    "Each front-side bus has a 64-bit wide data bus."

    The Macbook Pro apparently has a 32bit wide data bus and 32 bit addressing. :eek:
     
  7. TYC macrumors member

    Joined:
    Oct 29, 2006
    #7
    Could someone please try and install Windows XP x64 or Windows Vista x64 RC1 via Bootcamp?
    (I'd do it myself - but mine hasn't arrived yet)

    This would help determine if the MBP is truly 64bit ready.

    Cheers!


    -TYC-
     
  8. mleary macrumors regular

    Joined:
    Sep 13, 2006
    #8
    It will work, the chipset in the MBP is not unique to the mac, it's used in many C2D laptops and 64-bit os's work fine on them.
     
  9. nevir macrumors regular

    Joined:
    Aug 27, 2006
    #9
    But on that note, if the bus is only 32 bits wide - wouldn't any 64-bit data have to get chunked up anyway? To the point, negating or even slowing down most of the performance gain from 64 bit native apps?

    However, though, the iMacs have the same Intel 945 chipset, correct?
     

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