are all iMacs 64 bit?

Discussion in 'iMac' started by Eric Lewis, Sep 21, 2007.

  1. Eric Lewis macrumors 68020

    Eric Lewis

    Feb 4, 2007
    CANADA? eh?
    WHEN were 64 bit iMacs released? what was the first? thanks

    and whats the difference between 32 and 64bit?

  2. lofight macrumors 68000


    Jun 16, 2007
    I've read some things and i think that the Intel Core 2 duo's are 64bit,

    the difference i think is just that 64bit can do things much faster.
  3. Schtumple macrumors 601


    Jun 13, 2007
    on 32bit processors, each program you run can only access 4gb of Ram, on 64bit it can address much much more than that.

    The white iMacs with Core 2 Duo were the first to be 64bit with intel processors, but I think all of the iMac G5's are 64bit.
  4. kwood macrumors 6502a


    Jun 26, 2006
    In the Great White North.
    This is right, the iMac G5's had 64 bit, the Intel core duo was 32 bit, and the core 2 duo is also 64 bit.
  5. lofight macrumors 68000


    Jun 16, 2007
    that's really dissapointing why that a model later core duo only have 32bit
  6. marcg007 macrumors member

    Jan 28, 2003
    Boston area
    Don't remember the specifics but...

    I believe when Apple made the transition to Intel processors, they made some comment in passing that the first gen would once again only be 32bit but would change fairly quickly. They went from making a big deal about G5s being 64bit ready to not mentioning anything any where about it and then once 64bit intels were available, they started talking about it again. I could be wrong about that but it is what I vaguely remember reading about.
  7. Jasonbot macrumors 68020


    Aug 15, 2006
    The Rainbow Nation RSA
    bits are the bus lanes that apps use. So when you have 32bit apps they only utilize 32 of a possible 64 channels that take data from RAM to processor. utilising all 64 bits allows apps to theoretically run faster as more data is pushed through the processor cycle at any given time.

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