New iMac's use 1333 DDR3?

Discussion in 'iMac' started by Wicked1, Dec 15, 2010.

  1. Wicked1 macrumors 68040

    Wicked1

    Joined:
    Apr 13, 2009
    Location:
    New Jersey
    #1
    I just realized while looking for a new Mac that only the iMac's use 1333 DDR3 Ram?

    I wonder why Apple has not made this a standard on all of the upper end Mac's?
     
  2. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #2
    Because iMacs are using CPUs that support 1333MHz DDR3. Quad core Mac Pro and MBPs don't, their memory controller which is integrated into the CPU supports only 1066MHz
     
  3. TMRaven macrumors 68020

    TMRaven

    Joined:
    Nov 5, 2009
    #3
    The xeons in the mac pros don't need the 1333mhz ram, because they already provide triple channel memory bandwidth, compared to the dual channel memory bandwidth of the 1333mhz iMac memory.

    Intel used 1333mhz memory controller on lynnfields so their max memory bandwidth can be close to bloomfield and westmere's max memory bandwidth. There are some bloomfields and xeons that support 1333mhz memory, but they are 1000-1500usd per chip.

    For you, the consumer, you won't notice the difference between dual channel 1066 and dual channel 1333 bandwidth anyways.
     
  4. Wicked1 thread starter macrumors 68040

    Wicked1

    Joined:
    Apr 13, 2009
    Location:
    New Jersey
    #4
    I know you won't see the difference between the 1066 and 1333 just struck me as odd only because with Macs I was used to looking at the 1066, that's all.

    Personally Mac hardware performs better than a PC setup the same way, that is why I like that Apple develops the OS and HW, works well together.
     

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