USB-C Hub draining battery?

Discussion in 'MacBook Pro' started by Enrico, Feb 27, 2018.

  1. Enrico macrumors 6502

    Enrico

    Joined:
    Feb 6, 2007
    Location:
    Milano / Roma
    #1
    I just got a QacQoc USB-C hub, but after connecting it to the TV via HDMI presenting a Powerpoint for 1h30, it got VERY hot and the Mac discharged about 40%.

    Is this the normal behaviour I should expect, or should I return it for something better?
    Not sure if the original Apple adapter would be draining this much battery from the Mac as well... or get this hot!
     
  2. negativzero macrumors 6502a

    Joined:
    Jul 19, 2011
    #2
    Its not the hub, you're presenting Powerpoint which will drain the battery faster as the second screen usually pulls more power for the dGPU or iGPU to run.

    As a side effect, yes, the hub will get hot.
     
  3. Enrico thread starter macrumors 6502

    Enrico

    Joined:
    Feb 6, 2007
    Location:
    Milano / Roma
    #3
    Great, so basically the Apple adapter would do the same I guess!
    Is that a PowerPoint bug that it would make sense to disable the dGPU or this is normal?
     
  4. negativzero macrumors 6502a

    Joined:
    Jul 19, 2011
    #4
    You can't disable the dGPU if you need a second screen. The Macs are wired like this.
     
  5. bennibeef macrumors 6502

    Joined:
    May 22, 2013
    #5
    Plain simple:

    The macbook needs more power because you connected a second display.
     
  6. Enrico thread starter macrumors 6502

    Enrico

    Joined:
    Feb 6, 2007
    Location:
    Milano / Roma
    #6
    How does the 13" behave in this regard, without a dGPU?
    I suspect it would have a better battery life while presenting...
     
  7. jerryk macrumors 601

    Joined:
    Nov 3, 2011
    Location:
    SF Bay Area
    #7
    Potentially. But if your presentation contains video or a lot of animations, morph transitions, etc it could get jerky.
     

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6 February 27, 2018