Ram issue 16gbx1 on 2012 macbook pro 13"

Discussion in 'MacBook Pro' started by mihairomanian, Nov 28, 2018.

  1. mihairomanian macrumors newbie

    May 15, 2016
    Hi everyone,
    So I am greatly confused by the fact that I had a 2011 macbook pro 13" running with 24gb of ram no issues for the last 3 years. I had a 16gb crucial ddr3l module and a 8gb ddr3 module ( i know its a ****** setup ). Anyways after parting with my 2011 macbook pro and handing it over to my sister I decided to grab a 2012 macbook pro 13" just because I loved this form factor so much and it also had some much needed upgrades ( usb 3.0, better igp, etc. ). I have come to find that the 2012 macbook pro does not use the 16gb ddr3L module that had been working on my 2011 macbook pro. At first i thought it was the module itself and so i reached out to crucial and placed an RMA request. The new module arrived and I installed it , with again the macbook not even reading it or using the 16gb memory, I thought that it was crazy that I would have another messed up module but again i reached out to Crucial and placed an RMA request. I received now my 2nd replacement and it still wont read or use the 16gb from this module, What is up ???? What do I need to do ? is it an EFI firmware issue ? do I need to downgrade ?

    My current EFI for my mid 2012 macbook pro is : MBP91.00D9.B00
    SMC version: 2.2f44
    OS : Mavericks ( Love the old look over the new look )
  2. mihairomanian thread starter macrumors newbie

    May 15, 2016
  3. leman macrumors G3

    Oct 14, 2008
    Intel memory controllers of that time didn’t support 16GB RAM sticks. I assume that your old laptop had the NVidia chipset which might have supported it.
  4. mihairomanian thread starter macrumors newbie

    May 15, 2016
    my laptop was the 13inch 2011 model, and it did work.
  5. robvas macrumors 68030

    Mar 29, 2009
    1600MHz DDR3 PC3-12800 in the 2012
    1333MHz DDR3 PC3-10600 in the 2011

    What speed is your chip?

    It shouldn't work, though.

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4 November 28, 2018