RAM Usage on MBP

Discussion in 'MacBook Pro' started by ModusPwnin', Nov 23, 2016.

  1. ModusPwnin' macrumors newbie

    Joined:
    Nov 21, 2016
    #1
    I'm hoping to run Solidworks through Parallels occasionally on a non-TB 13in 2016 MBP. Thus, I'm leaning towards getting 16gb of RAM. However, I know that over 90% of the time, I won't be needing that much RAM, so I'm wondering: how exactly does macOS utilize free RAM? Does macOS take advantage of the extra RAM to do anything behind the scenes, like pre-loading commonly used programs, or using the extra RAM as cache for the processor? If so, will this negatively affect battery life?
     
  2. viljamip macrumors regular

    Joined:
    Jan 22, 2016
    #2
    Yes, macOS tries to utilize all of the RAM available. I have pretty much always over 20/32GB used in my iMac and more if I do something that requires more. You can go to Activity monitor and it tells you what your RAM is used for. I read some where that doubling your RAM capacity adds about 10% of its power usage. I'd estimate that the low power RAM used in the MBP will use at most 20% of the whole systems power so it is safe to say that you will see a battery life decrease of about 1-5%, which is hardly noticeable. Especially as the non-TB easily gets past 10h in light use.
     

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