Can I put my MBP 2012 ram into a MBP 2009?

Discussion in 'MacBook Pro' started by iLuvMyMacToo, Oct 13, 2012.

  1. iLuvMyMacToo macrumors regular

    Joined:
    May 18, 2010
    Location:
    Australia
    #1
    I've upgraded the ram in my MBP 2012 to 16GB and so now I have the two sticks left over that came with it. As my partner still has a MBP 2009 do you think I could use the 2 x 4GB sticks in that safely?
     
  2. bobcan macrumors 6502a

    bobcan

    Joined:
    Jan 8, 2007
    Location:
    Sunny but Cold.. Canada
    #2
    Possibly.. Same 204pin module.. :-/

    You will need t be more specific on exact model #'s to check on RAM, but a 2009 is likely a 2.66/2.6 speed and will use 1066 MHz PC3-8500 DDR3 SDRAM

    A 2012 model is going to most likely have 1600 MHz PC3-12800 DDR3L SDRAM which is still a 204 pin DDR3 Module, so it will likely 'fit' but at best it would run at the lower clock speed.. The new 'L' Low Voltage RAM runs @ 1.35v, and the other at 1.5v.. I cannot say how that may work out for sure..

    That being said, I DO hope someone more 'techy' will chime in here.. :confused:
     
  3. SDAVE macrumors 68040

    SDAVE

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    Nowhere
    #3
    Just get ram for your 2009. The max is definitely 8GB. RAM is cheap nowadays.

    But you can try, I don't see why it won't work. It will just run at lower speeds. You have nothing to lose. It won't break. Go for it.
     
  4. the-wanderer macrumors member

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    twilight zone
    #4
    ram clocks are specified at the nominal operating conditions, it is possible to overclock them and underclock them as well as manipulate the latency.

    the faster ram will downclock on compatible system.

    if the system is not compatible, it will not run properly. you'll get kernel panics and bombs but it will do no permanent damage.
     
  5. Dark Void macrumors 68030

    Dark Void

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    Cimmerian End
    #5
    Worth a try, it will either run at lower speeds or not work at all as others have said. If it doesn't work, uninstall it, reinstall the old RAM for now, and purchase the correct module in the future if it's worth it to you.
     
  6. pgiguere1 macrumors 68020

    pgiguere1

    Joined:
    May 28, 2009
    Location:
    Montreal, Canada
    #6
    I tried 2011 (1333 MHz) RAM on a 2009 (1066 MHz) MBP. The memory downclocked without problem.
     
  7. iLuvMyMacToo thread starter macrumors regular

    Joined:
    May 18, 2010
    Location:
    Australia
    #7
    Thanks for all your responses.

    It's not about wanting to get 8GB of RAM for the 2009 model specifically, it's just that I will have it lying around after I upgrade my current 2012 MBP and thought I might as well just use it for the 2009 model if I can.

    I'll give it a try.
     
  8. SDAVE macrumors 68040

    SDAVE

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    #8
    Got nothing to lose.

    It's just RAM.
     
  9. iLuvMyMacToo thread starter macrumors regular

    Joined:
    May 18, 2010
    Location:
    Australia
    #9
    Just a follow up to advise the ram from my 2012 MBP does not function in a MBP 2009, it won't even startup.

    Well looks like I have 2 x 4GB sticks to try and sell
     
  10. T5BRICK macrumors 604

    T5BRICK

    Joined:
    Aug 3, 2006
    Location:
    Oregon
    #10
    That's too bad. It must be just a little bit too far out of spec for the MBP to handle. I'm actually running 2 x 4GB sticks of 1333MHz RAM in my mid 2009 and it works great.
     

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