Can I upgrade MBP late 2008 to RAM 1333MHz

Discussion in 'MacBook Pro' started by hmadacompaq, Apr 27, 2013.

  1. hmadacompaq macrumors newbie

    Joined:
    Mar 31, 2010
    #1
    i have MBP late 2008 and i want to upgrade the ram

    i have 2g ram one for each ram of 1066

    and i want to upgrade to one ram 4g of 1333

    Is ti Ok or not ?
     
  2. chrisperro macrumors 6502

    chrisperro

    Joined:
    Oct 24, 2009
    Location:
    canada
    #2
    you can try one 1066 and one 1333 but it won't work 1333 only.
     
  3. Asuriyan macrumors 6502a

    Joined:
    Feb 4, 2013
    Location:
    Indiana
    #3
    RAM will scale down to the maximum speed supported by the computer. Since that generation had a 1066MHz system bus I believe any RAM you use will run at a maximum of that speed. It will still work, but there's not going to be any speed improvement.
     
  4. Orlandoech macrumors 68040

    Orlandoech

    Joined:
    Jun 2, 2011
    Location:
    Salt Lake City, UT
    #4
    ^ what he said.

    It will run and post, but only at the native bus speed of the MBP.
     
  5. hmadacompaq thread starter macrumors newbie

    Joined:
    Mar 31, 2010
    #5
    i'm going to buy ram 4 giga 1333 tomorrow and we will see:):):)
     
  6. BL4zD macrumors 6502

    Joined:
    Sep 22, 2010
    #6
    RAM is supposed to downclock but in the case of older macbooks there are known issues with it. That's why the first response suggested one known workaround of using one slower speed RAM module so the faster one is forced to downclock.

    Another known workaround is to use a Windows computer and edit the memory timings so that it will run at the slower speeds.

    Buying two faster modules and hoping they'll work is going to be an exercise in frustration. Even if it boots you'll eventually encounter random kernel panics and all sorts of other seemingly random errors. Then again it might work but remember that memory incompatibility is not a valid reason for return, generally.
     
  7. chrisperro macrumors 6502

    chrisperro

    Joined:
    Oct 24, 2009
    Location:
    canada
    #7
    exactly, just buy the ram that is compatible with your macbook.
     
  8. hmadacompaq thread starter macrumors newbie

    Joined:
    Mar 31, 2010
    #8
    i bought ram 4 giga of 1333 in my MBP late 2008

    and every thing is ok and faster

    no problem until now
     
  9. kycophpd macrumors 6502a

    kycophpd

    Joined:
    Jun 7, 2009
    Location:
    Louisville, Kentucky
    #9
    I just upgraded my wife's late 2008 after making sure it has the updated firmware. I put two 4 GB modules in for a total of 8. It was the 1333/1066 memory they sale that will do 1333 if the computer will accept it but if not, works at 1066. The reason I went for that was the fact that it will work on newer computers too so if I find a great deal on a newer Macbook with less ram that I just cant pass up, I can move the memory over.

    Her late 2008 has worked flawlessly with the new ram and is like a new machine.
     

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