Any way to turn off high performance graphics when using external monitor?

Discussion in 'MacBook Pro' started by austin4ski, Dec 10, 2016.

  1. austin4ski macrumors newbie

    Dec 10, 2016
    Hey all,
    I have the 15in 2016 TB MBP
    I notice if I have an external monitor plugged in my battery life is only 3.5 hours even without any applications open. I looked into it and I believe it's because external monitors trigger the high performance graphics, I don't think gfxcardstatus can turn it off can it?

    Battery life is fine without anything plugged in.

  2. leman macrumors G3

    Oct 14, 2008
    AFAIK, this is not possible because the video output is wired via the dGPU. Why are you runnning an external display without power supply though?
  3. Awjvail macrumors 6502

    Nov 21, 2010
    You're sitting at a desk. Why wouldn't you plug your computer in?
  4. Jaekae macrumors 6502a

    Dec 4, 2012
    apple never thought someone would sit at a desk with an external monitor and choose to use battery power, the battery is more for on the go use. So no external monitor only run on the amd card
  5. austin4ski thread starter macrumors newbie

    Dec 10, 2016
    Ah, I see..That's unfortunate
    My goal was to avoid bringing the charger with me every day to work where I use an external monitor.

    thanks for the replies everyone!
  6. fs454 macrumors 68000

    Dec 7, 2007
    Los Angeles / Boston
    Well, give gfxcardstatus a try. It allows you to sort of lock into a certain GPU and force it to either be integrated only or dedicated. I've used it to force integrated while doing light photoshop tasks on battery power on my Late 2013, but haven't given it a shot on the 2016 yet or specifically with external displays.
  7. Queen6 macrumors 603


    Dec 11, 2008
    Putting out the fire with gasoline...
    You best solution is just to purchase a 2nd charger and be done with it.

  8. Stotka macrumors regular


    Jul 29, 2009
    This can only work if you dont use external monitors. But OP needs it while using an external monitor.
  9. cerberusss macrumors 6502a


    Aug 25, 2013
    The Netherlands
    Get a couple of the Innergie chargers. They're 45 watts and come with an integrated USB-C cable, which saves you the hassle (and cost) of making sure you get a good quality cable. I've got one and it works great.

    Here's a good review by an engineer:
  10. austin4ski thread starter macrumors newbie

    Dec 10, 2016

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