2009 8GB RAM upgrade 256/512MG? Help!

Discussion in 'MacBook' started by palmskinny, Dec 27, 2012.

  1. palmskinny macrumors newbie

    Dec 27, 2012
    Im going to upgrade my late 2009 unibody RAM to 8gb but on Crucial website they sell the:

    8GB Kit (4GBx2), 204-pin SODIMM, DDR3 PC3-8500 memory module

    This is the correct one but it comes in 256meg x 64 and 512meg x 64. Which one is correct and if both is the 512 worth the extra? Whats the difference?

    Any help is much appreciated
  2. MisterKeeks macrumors 68000


    Nov 15, 2012
  3. palmskinny thread starter macrumors newbie

    Dec 27, 2012
  4. logana macrumors 65816


    Feb 4, 2006
    That link is for a 4GB kit (2 x 2GB sodimms) and Crucial don't appear to know that your MacBook will run 8GB....

    This is the ram you need http://www.crucial.com/uk/store/partspecs.aspx?IMODULE=CT2KIT51264BC1067 though you should be able to find for less than £30 fairly easily. I have used that ram in a 2010 MacBook Unibody 2.4 so you should not have any problems

    The 256meg and 512meg specs are just a description of the size of the individual chips on the ram module and for your purpose is really irrelevant

    What you need is 2 x 4GB DDR3 PC8500 modules - faster modules will be cheaper but your machine will probably not boot with anything faster (some do, some don't) so not worth the risk...

    Try http://www.amazon.co.uk/Crucial-Sodimm-Laptop-Memory-Upgrade/dp/B001MX5YWI/ref=sr_1_4?ie=UTF8&qid=1356651792&sr=8-4

    since nearly all the reviews are from Mac users (MacBooks, MacBook Pros, iMacs etc)

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