iMac 27 late 2009, replace my DDR3 1066MHZ with 1333MHz ???

in Genius Bar edited January 2014
guys, need your help here..

I'm running on only 2x 2gb DDR3 1066 of ram on my i7 27inch, late 2009 2.8 GHZ

what is the cost efficient way to upgrade ram? since 1333 and 1066 cost about the same now.. I was thinking to buy 4x4gb 1333.. and throw the 2gb out..

I am so confused after the researches.. can someone give me a direct answer? hah

thanks in advance.


  • Reply 1 of 3
    Should work. It'll just downclock to 1066.
  • Reply 2 of 3
    Originally Posted by Tallest Skil View Post

    Should work. It'll just downclock to 1066.

    thanks, appreciated !!
  • Reply 3 of 3
    so.. i just bought Kingston DDR3 1333 4x4gb

    it is working fine right now!!! woot! and it even shows the speed at 1333..

    in "about this Mac" it reads:

    where as it was reading

    does this mean it runs at 1333? or it just says that??

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