Can I use PC2-6400 RAM in a gen 1 MBP?

Discussion in 'MacBook Pro' started by StlSportsMed, Feb 13, 2014.

  1. StlSportsMed macrumors member

    Jan 28, 2009
    My current set up is a 1gb stick of 5300 and a 2gb stick of 6400.

    I know it is supposed to only take 5300, but since one of the sticks is 6400 will it take both being 6400 or does at least one stick have to be 5300?
  2. saturnotaku macrumors 68000

    Mar 4, 2013
    In theory, the Mac should automatically adjust the new stick's speed to match the slower one. In practice, this doesn't always happen, as the first couple generations of MacBook Pro were very picky about RAM. All you can do is try and hope for the best.
  3. StlSportsMed thread starter macrumors member

    Jan 28, 2009
    Well I have an other 2gb stick of 6400 at home I can steal from the wifes laptop, Ill see if that works

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