6gb ram upgrade

Discussion in 'MacBook Pro' started by lilcosco08, Jun 1, 2010.

  1. lilcosco08 macrumors 65816

    lilcosco08

    Joined:
    May 27, 2010
    Location:
    Dayton
    #1
    Anyone know if MBP supports mismatched 1x4gb + 1x2gb ram sticks?
     
  2. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #2
    Yes, they do, except the models that don't support 6GB of RAM (pre 2008/9 - Unibody models).
     
  3. steve2112 macrumors 68040

    steve2112

    Joined:
    Feb 20, 2009
    Location:
    East of Lyra, Northwest of Pegasus
    #3
    Actually, the older MBPs will support 6GB. I have 6GB running just fine on my 2007 2.4 MBP. MBP 5,1 will run 6GB max. 5,2-5,5 will run 8GB. Apple claims it will only support 4GB, but the hardware will do more and OSX will use it just fine.
     
  4. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #4
    Thanks for confirming that, I wasn't so sure anymore.

    OP, you can use www.everymac.com ti check out specific technical data on Macs, it even lists the maximum, unofficially supported RAM capacity.
     
  5. DesmoPilot macrumors 65816

    Joined:
    Feb 18, 2008
    #5
    If the size of the two sticks don't match I'm pretty sure you'll lose dual-channel capability.
     
  6. steve2112 macrumors 68040

    steve2112

    Joined:
    Feb 20, 2009
    Location:
    East of Lyra, Northwest of Pegasus
    #6
    I was a test user for that around our office. We had a bunch of 2007 era MBPs, and had some users complaining they were "slow". I personally think they were just jealous of the new unibody designs. I found the tests on Macsales.com and showed them to my boss, and he bought some upgrades for us (including his). To be honest, the only time I noticed a big difference was when running VMs on it. But it's still nice to have it and not need it.

    Oh yeah, Everymac is a great site.

    Edit: losing dual channel isn't that big of a deal. OWC ran some tests with and without dual channel memory, and it didn't make much of a difference. They basically found that the benefits of having more memory outweighed the benefits of less memory with dual channel. I'll try to dig up their tests.
     

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