New Ram errors

Discussion in 'MacBook Pro' started by MaxCaron, May 17, 2013.

  1. MaxCaron macrumors newbie

    May 1, 2013
    Hi everyone,

    I bought 16gb of ram off ebay for my late 2011 15" mbp and it seems to work just fine when using my laptop but doesn't pass the memtest. I tried booting my mac while holding command "s" and get the same results. Here's a copy of the results from Rember but when doing the full one I get a couple more errors then shown on this log.
    Please tell me what you think, anything will help I know close to nothing about Ram :confused:. The Ram is Patriot 16 GB 1333 MHz DDR3 that I bought off ebay, should I return it or try it since it seems to work? thank you for the help!


    Memtest version 4.22 (64-bit)
    Copyright (C) 2004 Charles Cazabon
    Copyright (C) 2004-2008 Tony Scaminaci (Macintosh port)
    Licensed under the GNU General Public License version 2 only

    Mac OS X 10.7.5 (11G63) running in multiuser mode
    Memory Page Size: 4096
    System has 8 Intel core(s) with SSE
    Requested memory: 12047MB (12632932352 bytes)
    Available memory: 12047MB (12632932352 bytes)
    Allocated memory: 12047MB (12632932352 bytes) at local address 0x0000000101000000
    Attempting memory lock... locked successfully
    Partitioning memory into 2 comparison buffers...
    Buffer A: 6023MB (6316466176 bytes) starts at local address 0x0000000101000000
    Buffer B: 6023MB (6316466176 bytes) starts at local address 0x00000002797da000

    Running 1 test sequence... (CTRL-C to quit)

    Test sequence 1 of 1:

    Running tests on full 12047MB region...
    Stuck Address : setting 1 of 16 ok
    Linear PRN : setting 1 of 16 ok
    Running comparison tests using 6023MB buffers...
    Random Value : \ ok
    Compare XOR :  ok
    Compare SUB :  ok
    Compare MUL :  ok
    Compare DIV :  ok
    Compare OR :  ok
    Compare AND :  ok
    Sequential Increment:  ok
    Solid Bits : setting 1 of 64 ok
    Block Sequential : setting 1 of 256

    FAILURE! Data mismatch at local BUFA address 0x0000000252840c10, BUFB address 0x00000003cb01ac10
    BUFA Data: 0x1212121212121213, BUFB Data: 0x1212121212121212

    Checkerboard : setting 1 of 64
  2. justperry macrumors G3


    Aug 10, 2007
    In the core of a black hole.
    If Memtest outputs an error on the RAM it means the RAM is NOT OK, return it even though it seems to be running well.
    Get Crucial, not the cheapest but one that has almost never problems.
  3. AppleMacFinder macrumors 6502a


    Dec 7, 2009

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