What is the fastest RAM I can put in my MBP?

Discussion in 'Buying Tips and Advice' started by zain, Dec 27, 2008.

  1. zain macrumors newbie

    Dec 27, 2008
    I have a 17" 2.6GHz MBP from the refresh around March of this year (the last refresh before unibody came out). I currently have 2GB (2x1GB) of DDR2 667MHz RAM and I'm going to upgrade to 4GB (2x2GB). Can I put in faster RAM? Will it improve performance noticeably?
  2. zain thread starter macrumors newbie

    Dec 27, 2008
    Yeah, I know I can put 2x2GB of DDR2-667 in there. My question is if I can put anything faster than that, and if so, whether or not it will make a significant performance difference.

    For example, there is this Kingston 2x2GB DDR2-800 pack for slightly more than your link. Will it run at 800MHz in my MBP, or will it be downclocked to 667MHz? http://www.newegg.com/Product/Product.aspx?Item=N82E16820134831
  3. mcavjame macrumors 65816


    Mar 10, 2008
    phased to this universe
    I think faster RAM will just clock to the bus speed. Check this thread: http://forums.macrumors.com/showthread.php?t=536135
  4. zain thread starter macrumors newbie

    Dec 27, 2008
  5. brop52 macrumors 68000


    Feb 26, 2007
    I would trust This G-Skill CAS-4 set over your Kingston set just because of the more reviews available on it on Newegg.
  6. kastenbrust macrumors 68030


    Dec 26, 2008
    North Korea
    Don't try putting faster RAM than 667MHz in your macbook pro, firstly it wont have any effect, yes it will downclock, and secondly i know someone who did that and shorted the ram docks and the logic board and then the main PSU, which meant his whole laptop needed replacing, luckily he put the old ram back in and denied any tampering while it was still under warranty.

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