Need your help with a laptop memory

Discussion in 'Mac Basics and Help' started by roynetwork7, Oct 21, 2012.

  1. macrumors newbie

    roynetwork7

    Joined:
    Oct 21, 2012
    #1
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    Normally it does, but the CL11 RAM seems to have issues with the MBP, or the MBP has issues with CL11 RAM:

    from this quite long thread
     
  3. macrumors 6502a

    Stooby Mcdoobie

    Joined:
    Jun 26, 2012
    #3
    That RAM is 1600MHz, and your Mac takes 1333MHz. Something like this is what you want.
     
  4. AppleMacFinder, Oct 21, 2012
    Last edited: Mar 15, 2013

    macrumors 6502a

    AppleMacFinder

    Joined:
    Dec 7, 2009
    #4
    Unfortunately, this is CL11. To avoid the potential problems (kernel panics),
    you should buy something that is CL9: 1333MHz (slightly cheaper) or 1600MHz (faster)

    I have 1600MHz CL9 (9-9-9-24) Corsair Vengeance 8GB kit (CMSX8GX3M2A1600C9)
    and my benchmarks are about 15% faster than Apple stock RAM :cool:

    MBP 2011 models support up to 16GB 1600MHz RAM. As I said earlier, CAS latency should be equal to 9.
     
  5. macrumors 6502a

    Stooby Mcdoobie

    Joined:
    Jun 26, 2012
    #5
    I thought I read somewhere that the 2011 models clocked the RAM back down to 1333MHz if you go to 1600MHz, or is that just the 13" model? Or was I misled completely?
     
  6. AppleMacFinder, Oct 21, 2012
    Last edited: Mar 15, 2013

    macrumors 6502a

    AppleMacFinder

    Joined:
    Dec 7, 2009
    #6
    That depends on CPU which is inside your Macbook Pro.
    If CPU does not support 1600MHz RAM, it will be downclocked to 1333MHz.
    The information about memory support could be found on Intel website (ARK page)

    Screen size | Early 2011 ......... | Late 2011 .......... | Mid 2012 ........... |
    13" ....... | 2410M/2620M ........ | 2435M/2640M ........ | 3210M/3520M ........ |
    15" ....... | 2635QM/2720QM/2820QM | 2675QM/2760QM/2860QM | 3615QM/3720QM/3820QM |
    17" ....... | 2720QM/2820QM ...... | 2760QM/2860QM ...... | -------------------- |


    Marked CPU models support up to 1600MHz and 32GB RAM
    Other CPU models support up to 1333MHz and 16GB RAM

    As you see, there are no 13" 2011 models that support 1600MHz RAM :(

    For more interesting information, please check the Buying RAM guide
     
  7. macrumors 6502a

    Stooby Mcdoobie

    Joined:
    Jun 26, 2012
    #7
    Ah, thanks for the info. I knew I wasn't crazy! haha
     
  8. macrumors regular

    Joined:
    Mar 19, 2012
    #8
    How do you find out, which model number you have? It is not listed, as I can see, in the system specs.

    Only something like:
    - Macbook pro, 2.2, intel core i7.

    Mine is late 2011, 15'' - but what is the exact number?

    Morten
     
  9. macrumors regular

    Joined:
    Jun 14, 2009

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