RAM Error (FAILURE! Data mismatch) after Testing with Rember

Discussion in 'Mac mini' started by brock01, Dec 29, 2013.

  1. brock01 macrumors newbie

    Joined:
    Dec 29, 2013
    #1
    - Computer: Mac mini, Late 2012, Processor 2.5 GHz Intel Core i5, Memory 8 GB 1600 MHz DDR3, Software OS X 10.9.1 (13B42)
    - RAM Recommended by Apple: 4GB (two 2GB) of 1600MHz DDR3 memory, http://support.apple.com/kb/SP659
    - RAM Purchased on Amazon: Crucial 8GB Kit (4GBx2) DDR3 1600 MT/s (PC3-12800) CL11 SODIMM 204-Pin 1.35V/1.5V Notebook Memory Modules CT2KIT51264BF160B http://www.amazon.com/gp/product/B005LDLVAO/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1

    I used the program Rember (http://www.kelleycomputing.net/Rember) for testing:

    1. Original RAM that came with Mac Mini, 5 pass test, All tests passed.
    2. New RAM (Amazon purchase), two different tests with both sticks inserted, 5 pass test on the 4th pass:
    ----
    Walking Ones : setting 1 of 128

    FAILURE! Data mismatch at local BUFA address 0x0000000174fb29a8, BUFB address 0x000000022a2199a8
    BUFA Data: 0x000000007fffffff, BUFB Data: 0x000010007fffffff

    Walking Zeroes : setting 1 of 128
    ----
    3. New RAM, both sticks inserted, 1 pass test, All tests passed.
    4. New RAM, one stick inserted by itself, 5 pass test, All tests passed.
    5. New RAM, the other stick inserted by itself, 5 pass test, All tests passed.
    6. Apple Hardware test with both sticks inserted, no issue.
    7. Extensive Apple Hardware test with both sticks inserted, no issue.

    I am trying to decide on the following:

    1. Return to Amazon and say it is faulty.
    2. Return to Amazon and say it is incompatible.
    3. Use for a while to see if it causes any issues. (There have been no issues so far, and all seems to be working properly on my Mac.)

    Any input or advice on this issue would be very much appreciated as I am not very knowledgeable on Apple hardware or RAM.

    Thank you
     
  2. Crosscreek macrumors 68030

    Crosscreek

    Joined:
    Nov 19, 2013
    Location:
    Margarittaville
    #2
    That seems like some old software. What does your mini diagnostics check?
     
  3. brock01 thread starter macrumors newbie

    Joined:
    Dec 29, 2013
    #3
    Since my Mac Mini is Late 2012 (was introduced before June 2013) it still uses the Apple Hardware Test instead of the Apple Diagnostics (even though I am on Mavericks).
    http://support.apple.com/kb/ht1509
     
  4. Crosscreek, Dec 29, 2013
    Last edited: Dec 29, 2013

    Crosscreek macrumors 68030

    Crosscreek

    Joined:
    Nov 19, 2013
    Location:
    Margarittaville
    #4
  5. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #5
    In my experience, if you get a failure when testing RAM, reseat the RAM sticks and try the test again. With two slots, pull the RAM out, and swap between the slots for a good reseat.
    If you get the same failure again, call it a fail, and get the sticks replaced as bad.
    If you get a different fail code, reseat again, and test again.
    OR, if you are not comfortable with the results, get the chips replaced under warranty. It's not incompatible, just faulty. It happens...
    Crucial stands behind their RAM, so you shouldn't have difficulty getting good RAM to work.
    You COULD test each stick individually, to pin down a fail to a single stick.

    (Topher Kessler says it better! )
     
  6. brock01 thread starter macrumors newbie

    Joined:
    Dec 29, 2013
    #6
    Thank you so much DeltaMac.

    I reseated (switched the slots the RAM sticks were in). I then did a 5 pass test and also a 20 pass test with Rember.

    Both tests passed with no errors! I would not have tried this without you mentioning it. You saved me from having to return it. Thank you.

    Another note for Crosscreek, the error I was receiving previously (before the reseat) was the same each time. Therefore if you test with Rember and get the same error (posted above), as you know, you'll probably just need to reseat the sticks.

     

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