1066 vs 1333MHz ram

Discussion in 'iMac' started by meche, Oct 28, 2011.

  1. meche macrumors newbie

    May 31, 2008
    Hey guys,

    I'm looking to upgrade the ram on my 2011 iMac. There's currently 4GB of 1333MHz DDR3 ram installed. Would there be any problems if the new ram I add is 8gb of DDR3 1066MHz?

    I assume there would be any incompatibilities but I'd like to make sure before combining these different RAM modules

  2. Gav2k macrumors G3


    Jul 24, 2009
    Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

    It would work but why would you slow your machine down?
  3. djrod macrumors 65816


    Sep 16, 2008
    Madrid - Spain
    It would work, but the fastest ram will run at the same speed of the slowest, buy a 1333 module, there is almost no difference in price

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