mac pro 5.1 max resolution 3200x1800 4k display

Discussion in 'Mac Pro' started by thewolfro, Oct 7, 2016.

  1. thewolfro, Oct 7, 2016
    Last edited: Oct 7, 2016

    thewolfro macrumors member

    Joined:
    Aug 27, 2009
    #1
    Hi Guys,

    I just bought VP2780 monitor and even though at the "About this mac" I am seeing the monitor correctly with a resolution of 3840x2160, when i am trying to set the resolution of in "Display preferences" the maximum i am seeing in the scaled list is 3200x1800.

    I got an Nvidia GTX 780 card and I am using the Display cable at the moment. I tried to use the HDMI also and other than the refresh rate (60 vs 30 Display port/HDMI )i do not see a change in resolution. However i tried to plug both cables at the same time and then the Mac though i got two monitors and if i clicked mirror display i could then set the 3840x2160 resolution but to be honest i am not sure what the implications are of using both Display and HDMI cable at the same time into the same monitor when trying to full the MAC pro that it has 2 monitors nor do i find a logical explanation as of why the 4k resolution is working with 2 monitors and not with one.

    Did someone see this issue before? Did you manage to sort it out?

    Thanks !
     
  2. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
  3. thewolfro thread starter macrumors member

    Joined:
    Aug 27, 2009
    #3
    I am running El Capitan.
    Also the driver for the videocard is the latest web driver from Nvidia
     
  4. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #4
    I think some 780 (if not all) can run with Apple driver. Did you try that?
     
  5. thewolfro thread starter macrumors member

    Joined:
    Aug 27, 2009
    #5
    Yes i tried that also and i also tried the monitor on Yosemite. still no luck
     
  6. Synchro3 macrumors 68000

    Synchro3

    Joined:
    Jan 12, 2014
    #6
    It's normal in El Capitan that the maximum in the scaled list is 3200x1800. For more resolutions hold Option down when you click "Scaled" and more resolutions show up.

    The 'normal' resolutions are already HiDPI, the others are defined '(low resolution)'.
     
  7. thewolfro thread starter macrumors member

    Joined:
    Aug 27, 2009
    #7

    Awesome! thanks a lot. that worked for me.

    Do you know if there is a way to increase the general font size (in all applications) ?
     
  8. Fl0r!an macrumors 6502a

    Joined:
    Aug 14, 2007
    #8
    Usually you're using HiDPI resolutions for scaling the GUI. "2560 x 1440 (HiDPI)" is the most common resolution on a 27" HiRes display. Internally it'll render at 5K with double size and scale it down to your display's native 4K resolution.
     
  9. Synchro3 macrumors 68000

    Synchro3

    Joined:
    Jan 12, 2014
    #9
    Yes, as FlOr!an said, the "2560 x 1440 (HiDPI)" resolution is the one to be preferred on a 27" 4K Display.
     

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