New Retina Macbook Pro 2015 super laggy with 4k

Discussion in 'MacBook Pro' started by dogbait, Jul 16, 2015.

  1. dogbait macrumors regular

    Joined:
    Feb 4, 2005
    Location:
    London, England
    #1
    Bought a Retina Macbook Pro 15" 2015 with everything maxed out. Works great, almost touching my Mac Pro 2013 in performance.

    However...when hooking it up to a 4K Dell UP3214Q display the whole user interface gets super laggy.

    Has anyone experienced lag issues with Macbooks and 4K panels?
     
  2. RoboWarriorSr macrumors 6502a

    Joined:
    Feb 23, 2013
    #2
    Are you using thunderbolt or HDMI? I'm guessing you're using HDMI which is capped by the 30 hertz limit. Thunderbolt allows up to 60 Hertz 5K display on the discrete model (4K 60 hertz on the integrated model) so the lag would be eliminated.
     
  3. auhlixer macrumors regular

    Joined:
    Apr 15, 2006
    Location:
    Philadelphia, PA
    #3

    Go into the monitor settings on the monitor and change displayport from 1.0 to 1.2 or what ever the greater one is.
     
  4. dogbait thread starter macrumors regular

    Joined:
    Feb 4, 2005
    Location:
    London, England
    #4
    Thanks, that was it!

    Stuff like Expose is still laggy but much improved.
     
  5. Samuelsan2001 macrumors 603

    Joined:
    Oct 24, 2013
    #5
    All reports suggest El Capitan will fix that for you...
     
  6. dogbait thread starter macrumors regular

    Joined:
    Feb 4, 2005
    Location:
    London, England
    #6
    Pity, was hoping to justify to the wife why I need a Mac Pro 12-core ;)
     

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