Liking my new MBA, wondering about old MBP

Discussion in 'MacBook Air' started by hakr100, Jul 13, 2013.

  1. hakr100 macrumors 6502a

    Joined:
    Mar 1, 2011
    Location:
    East Coast
    #1
    I've had my new MBA 13 for about a week and so far, I'm loving it. I've not noticed it slowing down yo conserve energy when running on batteries, but I seem to remember that my 2008 MBP, which I sold off a few years ago, did go into some sort of "on battery, powered down a little" mode when it was not plugged into the wall.

    Or is this just a false member conjured up from my experience with some earlier non Mac laptop? :D
     
  2. neteng101 macrumors 65816

    Joined:
    Jan 7, 2009
    #2
  3. hakr100 thread starter macrumors 6502a

    Joined:
    Mar 1, 2011
    Location:
    East Coast
    #3
    Thanks, but I am not talking about a "sleep state." I'm talking about the laptop just running slower when on batteries.
     
  4. neteng101 macrumors 65816

    Joined:
    Jan 7, 2009
    #4
    You're probably thinking of SpeedStep then...

    http://en.wikipedia.org/wiki/SpeedStep

    Basically the older Core processors would run at full power, and when on battery, they would run at slower speeds ie. a lower power state. It has since been replaced with Turbo Boost...

    http://en.wikipedia.org/wiki/Intel_Turbo_Boost

    Turbo Boost means the processor starts off at the lower power state, and only runs faster as workloads increase. I'm not sure if Turbo Boost is affected while on battery vs. adapter power, but you are pretty much only running faster when there's enough activity on the computer to warrant the speed increase, so most of the time you're already running in the lowest power state for the processor itself.
     
  5. FreakinEurekan macrumors 68040

    FreakinEurekan

    Joined:
    Sep 8, 2011
    Location:
    Eureka Springs, Arkansas
    #5
    You may be thinking of SpeedStep. Not sure if that is still done with the Haswell CPUs or not.
     

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