How to increase refresh rate with external display?

Discussion in 'MacBook' started by original poster, Nov 14, 2016.

  1. original poster macrumors member

    Joined:
    Apr 7, 2011
    Location:
    Berkshire, UK
    #1
    Hi guys,

    I have just bought an early 2016 MacBook and an LG 38UC99 (http://www.lg.com/us/monitors/lg-38UC99-W-ultrawide-monitor)

    I have connected it via USB-C however am only getting 30Hz refresh rate, how do I increase this to 60 as I am getting lag with my mouse.

    Any help would be greatly appreciated!

    Kind Regards,
    Chris
     
  2. BeatCrazy macrumors 65816

    Joined:
    Jul 20, 2011
  3. original poster thread starter macrumors member

    Joined:
    Apr 7, 2011
    Location:
    Berkshire, UK
    #3
    I am, however I have it running perfectly at 75Hz now!
     
  4. BeatCrazy macrumors 65816

    Joined:
    Jul 20, 2011
    #4
    I wouldn't have expected 75Hz to be possible. What did you do to get it unstuck from 30Hz?
     
  5. original poster thread starter macrumors member

    Joined:
    Apr 7, 2011
    Location:
    Berkshire, UK
    #5
    I followed a guide that I found on 9to5 Mac which worked perfectly!

    See attached. Screen Shot 2016-11-15 at 13.14.54.png Screen Shot 2016-11-15 at 13.15.46.png
     
  6. RyanC1384 macrumors newbie

    Joined:
    Nov 24, 2016
    #6
  7. pugxiwawa macrumors newbie

    Joined:
    Nov 10, 2009
    #7
    How did you connect to the monitor? USB-C to Apple Digital AV Multiport Adapter and then HDMI 2.0? I'm having problem getting 2016 MB to run at 60hz with LG 27UD68. Any help would be greatly appreciated. Thanks.

    EDIT:
    Nevermind, this is the new monitor that comes with USB-C port. Time to upgrade...
     
  8. vipergts2207 macrumors 65816

    vipergts2207

    Joined:
    Apr 7, 2009
    Location:
    Columbus, OH
    #8
    All the USB-C multiport adapters I've seen only support 4K at 30 Hz. You'll need a dedicated USB-C to HDMI adapter for 60 Hz, IF the rMB supports 4K at 60 Hz in the first place.
     
  9. BeatCrazy macrumors 65816

    Joined:
    Jul 20, 2011
    #9
    Yes, the '15/'16 MacBooks support 4K 60Hz. You either need to do it via USB-C, or use the Caldigit USB-C dock w/firmware update installed, the you can do HDMI 2.0 or DP. No hack needed on the MacBook, just Sierra.
     

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