Can't increase the refresh rate

Discussion in 'macOS Sierra (10.12)' started by Trusteft, Aug 15, 2017.

  1. Trusteft macrumors 6502

    Trusteft

    Joined:
    Nov 5, 2014
    #1
    My late 2012 mac mini connected to a 4K monitor.
    I can option to lower the resolution by choosing scale, did it to get 1080p so that I get 60hz but unfortunately I still get the only two options that I get when I am at 4K resolution. 29 and 30 hz.
    I know the monitor can do 60hz, I have connected another computer (custom made pc) and I get 60hz through DP just fine.
    I have the Mac connected through DP too.

    Am I doing something wrong?
     
  2. treekram macrumors 6502a

    Joined:
    Nov 9, 2015
    Location:
    Honolulu HI
    #2
    It's a limitation of the Intel HD4000 and how Apple chose to implement it in the Mini back in 2012. You might be able to get a higher refresh rate with SwitchResX but for 2012 Mini, I think that's 30Hz is the limit.
     
  3. Trusteft thread starter macrumors 6502

    Trusteft

    Joined:
    Nov 5, 2014
    #3
    Wait, you mean the late 2012 mac mini can't do 60hz on 1080p? Because according to Apple, it can.
     
  4. treekram, Aug 16, 2017
    Last edited: Aug 16, 2017

    treekram macrumors 6502a

    Joined:
    Nov 9, 2015
    Location:
    Honolulu HI
    #4
    For the 2012 Mini, at 4K or UHD, 30Hz is the max. You can get 60Hz at resolutions up to 2560x1600. With some wider but shorter monitors, you may also be able to get 60Hz as well. In your original post, you said you get 60Hz at 1080p. You cannot get 60Hz at 1080p in HiDPI (or "Retina") mode because the graphics hardware still needs to separately address 3840x2160 (or true 4K if you have that) pixels.
     
  5. Trusteft, Aug 16, 2017
    Last edited: Aug 16, 2017

    Trusteft thread starter macrumors 6502

    Trusteft

    Joined:
    Nov 5, 2014
    #5
    I don't know what you have been reading but it's not my post.
     
  6. treekram macrumors 6502a

    Joined:
    Nov 9, 2015
    Location:
    Honolulu HI
    #6
    I took this statement to mean at 1080p, you get 60Hz.

    On the 2012 Mini using your UHD or 4K monitor, whatever you have, if you can see all the pixels on your screen, 30Hz is the max refresh rate unless something like SwitchResX is able to increase the refresh rate. This is the case no matter what scaling you choose on the computer. If your monitor can display lower resolutions such that you see black borders around the image, then you should be able to get 60Hz up to 2560x1600.
     
  7. Trusteft thread starter macrumors 6502

    Trusteft

    Joined:
    Nov 5, 2014
    #7
    please stop "helping" me.
     
  8. Fishrrman macrumors G4

    Joined:
    Feb 20, 2009
    #8
    You can't do 4k @ 60hz with a late-2012 Mini.
     
  9. KUKitch macrumors 6502

    KUKitch

    Joined:
    Jan 10, 2008
    Location:
    England
    #9
    What was your "question", because they answered it
     
  10. Trusteft thread starter macrumors 6502

    Trusteft

    Joined:
    Nov 5, 2014
    #10
    Really? REALLY?
    --- Post Merged, Aug 16, 2017 ---
    Yes, thank you, I know that, I mentioned that, that's not the issue.
    --- Post Merged, Aug 16, 2017 ---
    Problem solved.
    I am not sure if this is how things are with other combinations of mac and monitor but...anyway.
    As I already mentioned in my first post, I couldn't get it to go to 60hz on 1920x1080. It just gave me the same options as under 4K, that is 29 and 30 hz.
    I noticed that other than 1920x1080 (and other resolutions) there was also the option for 1080p. I found it strange but said what the hell. By switching to 1080p (from 1920x1080) I now have the option for 50 and 60hz.
    Problem solved in a very funny way.
    Thanks all who read this.
     
  11. Fishrrman macrumors G4

    Joined:
    Feb 20, 2009
    #11
    OP wrote:
    "I noticed that other than 1920x1080 (and other resolutions) there was also the option for 1080p. I found it strange but said what the hell. By switching to 1080p (from 1920x1080) I now have the option for 50 and 60hz."

    That's because your Mini is "seeing" the connected display "as if it were a TV", and NOT as "a computer display". The choice of "1080p" is a dead giveaway.

    It sounds confusing and frustrating, because it is.

    There is a way to FORCE the Mini to recognize the display "as a computer display", that involves fooling with the terminal, moving files, etc.
     
  12. Trusteft thread starter macrumors 6502

    Trusteft

    Joined:
    Nov 5, 2014
    #12
    Since there is a working resolution/refresh rate by using the 1080p option instead of the 1920x1080, is there is a difference between "forcing" and not "forcing"? It already works.
     

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