RAM Upgrade - 2x2 or 1x4?

Discussion in 'iMac' started by brachson, Sep 18, 2011.

  1. brachson macrumors member

    Nov 14, 2010

    I want to upgrade my mid 2011 iMac with additional 4GB.

    Currently there is 2x2GB and here is the question:
    Should I buy new 2x2GB or can I buy 1x4GB so I can add 2nd 4GB later.
  2. 28Gauge macrumors 6502


    Sep 4, 2011
    From what I understand, memory needs to be installed/replaced in pairs. Therefore, you should go 2x2GB or 2x4GB.
  3. AcesHigh87 macrumors 6502a


    Jan 11, 2009
    New Brunswick, Canada
    Technically it doesn’t need to be but it will run better if it is. Basically, because the iMac runs in dual channel you will lose performace by only adding one stick (thus making it single channel). Go with the 2x2GB. If all else fails, you just upgrade both later.
  4. Phil A. Moderator

    Phil A.

    Staff Member

    Apr 2, 2006
    Shropshire, UK
    Personally, I'd go with 2 x 4GB - the difference is pretty small. For example, Crucial UK sells 2x4GB for £40 for the pair and 2x2GB at £22 for the pair: £18 difference for an extra 4GB is well worth it to not back yourself into a corner with future upgrades IMO
  5. jordan.1 macrumors newbie

    Sep 14, 2011
    I recently got my iMac and brought 1x4GB stick of ram for it a few days ago and noticed the difference straight away. So it works fine for me, no problem at all. I plan to buy another 4GB stick of ram in the next month to fill the empty slot.
  6. yusukeaoki macrumors 68030


    Mar 22, 2011
    Tokyo, Japan
    Or get 4GB x 4 and make it 16GB...
    4GB x 2 arent highly priced anymore so

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