Re: PC-8500 vs PC-12800 RAM on an older MacBook Pro

Discussion in 'MacBook Pro' started by dobrink, Sep 12, 2015.

  1. dobrink macrumors newbie

    Feb 4, 2013
    Hello, I have a MacBook Pro (15-inch, Mid 2010) 2.8 GHz, with 2x 2GB memory modules. The machine's maximum supported memory is PC-8500. I have tested it with PC-12800 and it works just fine.

    I would like to ask, should I buy 2x 4GB PC-12800 memory instead of the PC-8500 memory, to use in my current MacBook Pro (with the purpose that in the future when I buy a newer MacBook model, I can use this PC-12800 that will be supported by the newer device)...

    Do you think this PC-12800's higher CAS-latency of 11 will be visibly slower on my current Macbook Pro, compared to if it was with the PC-8500 modules with CAS-latency of 9?
  2. snaky69 macrumors 603

    Mar 14, 2008
    If you are able to notice CAS latency in RAM, I suggest you see a shrink, he may have meds for you.

    The RAM'll downclock itself to whatever your motherboard can handle, in some cases the timing won't work right and it'll refuse to boot.

    I wouldn't buy with the intention of sticking the upgrade in another Mac later. If you plan on upgrading RAM in a newer machine, don't expect to buy anything younger than 2012, MBP's have had soldered in RAM since the retina came about.

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