4k monitors and rx580 video

Discussion in 'Mac Pro' started by macguru9999, May 30, 2019.

  1. macguru9999 macrumors regular

    Aug 9, 2006
    Hi, if I buy a 4K LG monitor such as the LG 27UL600-W UHD and connect it to the radeon sapphire rx580 in my mac pro 5,1 via displayport, will the two be fully compatible, ie will i be able to scale the text in the system prefs ?
  2. cdf macrumors 6502

    Jul 27, 2012
    I have an LG 27UD88-W connected via DispalyPort to a Pulse RX 580. Like the UL600, the UD88 has a resolution of 3840 x 2160. Because of perfect pixel doubling, the display looks best when set to 1920 x 1080 HiDPI (retina), but other retina modes are available by option-clicking "Scaled" in the preference pane.

    If what you are referring to is the nice scaling menu pictured below, you will not see that. Only newer Macs have this menu. Instead, you will see a list of modes. However, the same modes should be available.
  3. macguru9999 thread starter macrumors regular

    Aug 9, 2006
    Thanks, I was afraid of that... I think I am better off sticking with what I have then, a dell 2560x1440 and everything is easy to read with just a little tweaking of the font sizing etc in browsers and finder.
  4. StuAff macrumors regular


    Aug 6, 2007
    Portsmouth, UK
    There is absolutely no difference whatsoever between the scaling the newer Macs will give you via that menu and the scaling a 4,1/5.1 gives by setting the exact scaled resolution. And you might prefer- at least some of the time- to run a higher scaled resolution anyway. I generally run 3008x1692. I say 'scaled resolution' because the output from the GPU will still be 3840x2160, the interface elements will be scaled up/down as appropriate (desktop images and 4k video will still display at full quality). Buy 4K, you won't regret it....
  5. mrtang42 macrumors member

    Apr 19, 2019
    @cdf is right. You will not get that scaling menu, instead you will get this.
    Retina effect will still be applicable. You will not regret to upgrade to 4k.

    Attached Files:

  6. macguru9999 thread starter macrumors regular

    Aug 9, 2006
    Thanks guys ! I bought an LG 27UD58 for just a few hundred bucks today and its great. I am running at 3200x1800 and the text and interface elements are all sharp. I am used to this scaling as I had a 2560x1440 25" dell before and everything is the same size but i have more real estate. This is the menu i get :

    Attached Files:

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5 May 30, 2019