Can I mix DDR3 PC3-8500 in mid-2010 3.6GHZ 21.5" iMac

Discussion in 'iMac' started by stevil, Jul 29, 2010.

  1. stevil macrumors newbie

    Aug 18, 2003
    D.C. Metro
    I have a BTO 21.5" 3.6GHZ i5 iMac on the way with the stock 4 GB RAM. I have 2 2GB DDR3 PC3-8500 sticks from when I upgraded to 8GB in my 17" MacBook Pro.

    Will I be able to add these to my new iMac? Will I see any performance hit, or just not realize a performance gain by adding PC3-8500 instead of DDR3 PC3-10600 RAM?

    At some point (3-6 months+) would probably sell the PC3-8500 sticks, along with the stock iMac RAM to upgrade to 12+ GB.... so I'm fine not even using the extra 8500 sticks now.
  2. Hellhammer Moderator


    Staff Member

    Dec 10, 2008
    Yes, you can use them, but all modules will then operate at 1066MHz

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