early 2008 MBP won't start after new RAM

Discussion in 'MacBook Pro' started by KilGil27, May 23, 2012.

  1. KilGil27 macrumors regular

    KilGil27

    Joined:
    Jul 29, 2006
    Location:
    Philadelphia
    #1
    I installed this ram in my early 2008 15" 2.4 core 2 duo macbook pro today, and it won't start up if I have both sticks in at once. It works with one of the new sticks, and one of the old sticks, but then I only have 3 GB, not the 4 I paid for. Is this ram not compatible with this model or is something else wrong?
     
  2. pragmatous macrumors 65816

    Joined:
    May 23, 2012
    #2
    Probably defective RAM. Get it RMA'd.

     
  3. KilGil27 thread starter macrumors regular

    KilGil27

    Joined:
    Jul 29, 2006
    Location:
    Philadelphia
    #3
    but would that only affect when both chips are in at once? because either one will work with the other old chip, just not together. curious...
     
  4. pragmatous macrumors 65816

    Joined:
    May 23, 2012
    #4
    Hmmm ...

    Ahh I missed that part.

    I've seen this in PC's quite often where one stick works but not both. I work in IT professionally and have been for 17 years. Usually updating the BIOS or UEFI resolves the issue. I'm not sure about macs. So yes it could be a compatibility issue.

    Crucial has a very good memory detector app that will detect your system and recommend memory that is guaranteed to work. Crucial is a very reputable brand name. http://www.crucial.com/

    newegg.com has a similar thing as well and will offer various brand names besides crucial.
    http://www.newegg.com/MemoryFinder/

     

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