Ram issue - problem

Discussion in 'MacBook Pro' started by bosco55, Jun 16, 2012.

  1. bosco55, Jun 16, 2012
    Last edited: Jun 16, 2012

    bosco55 macrumors newbie

    Jun 16, 2012
    I have been searching the forums looking for an answer to my problem.

    I have a 2.2Ghz i7 macbook pro and was given 2 x 4Gb modules so i can upgrade from 2 x 2Gb modules.

    I have changed / fitted ram before and have never had this problem before.

    My problem is i can fit both new modules but the macbook will only see one, regardless of what ever slot i fit it in. It will see one at a time in either slot but not both together.

    I can fit an original 2Gb and a new 4Gb and it will see both !!, it just won’t see the 2 x 4Gb

    Any ideas ?

  2. GGJstudios macrumors Westmere


    May 16, 2008
    One possibility is you haven't properly seated the RAM stick you're having problems with. The other possibility is that it's defective.
  3. user418 macrumors 6502a


    Aug 22, 2010
    GGJ is correct. Ran into same issue upgrading RAM in a 13" MBP. Problem was the first stick inserted was not pushed in firmly enough. Also make sure the little plastic tabs fit into the small notches on the sides of each stick.

    If you still have a problem you can the AHT or MemTest for Mac to check the RAM.
  4. rajiv.n macrumors newbie

    Jul 30, 2012
    Current RAM is 1067MHz, can i get use a 1333MHz ram card?

    hi i have a Macbook 2008 aluminium. 2.4 GHz.

    Wanted to upgrade my RAM from 2GB to 4GB.

    My current 2GB (2 cards of 1GB each) runs at 1067GHz, will a 4 GB ram (2 cards of 2GB each) running at 1333GHz work???

    Also, I read in one of the blogs that this macbook can support up to 8GB even though Apple Support says a Max of 4GB

    Please help! Mountain Lion is running really slow
  5. GGJstudios macrumors Westmere


    May 16, 2008
    You can find specs on all Apple products, including maximum RAM:
    Slow performance doesn't always relate to insufficient RAM, although it could be a factor. To determine if you can benefit from more RAM, launch Activity Monitor and click the System Memory tab at the bottom to check your page outs. Page outs are cumulative since your last restart, so the best way to check is to restart your computer and track page outs under your normal workload (the apps, browser pages and documents you normally would have open). If your page outs are significant (say 1GB or more) under normal use, you may benefit from more RAM. If your page outs are zero or very low during normal use, you probably won't see any performance improvement from adding RAM.

    Mac OS X: Reading system memory usage in Activity Monitor

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