New iMacs - 2 or 3 memory modules?

Discussion in 'iMac' started by Stingray454, Nov 18, 2009.

  1. Stingray454 macrumors 6502a

    Joined:
    Sep 22, 2009
    #1
    While browsing around I've stumbled over a few references to things like "tri-channel memory" and such. From what I understand (not that good with these things) some computer architectures / CPUs are optimized for using 3 memory modules, and some for using pairs (2 or 4).

    I just read some benchmark tests of the i7 with different memory configurations, and the 12Gb was is most cases on par or better than all the others when it came to performance, even better than the 16Gb one. Is the new iMac (i7) best suited to use 3 memory modules?
     
  2. fruitpunch.ben macrumors 6502a

    fruitpunch.ben

    Joined:
    Sep 16, 2008
    Location:
    Surrey, BC
    #2
    no. it is dual channel.
     
  3. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #3
    Any proofs? i5 supports only dual-channel but i7 supports triple-channel.

    Anyway, dual/triple-channel will speed up the RAM's performance but if you need a lot RAM, then its better off getting the maximum amount
     
  4. gibsonjv macrumors newbie

    Joined:
    Nov 10, 2009
    Location:
    Ohio
    #4
    Memory should be upgraded in pairs for the iMac Core i5s and i7s. This is one of the major differences between the Bloomfield (Mac Pros) and the Lynnfield (iMacs) platforms. This article from xbit goes into the nitty-gritty differences of the memory controller between the two platforms.
     

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