4k 60hz usb-c to hdmi 2.0 on Macbook Pro Late 2016?

Discussion in 'MacBook Pro' started by FeedbackJar, Nov 30, 2016.

  1. FeedbackJar macrumors newbie

    Joined:
    Sep 30, 2009
    #1
    Has anyone tried setting up 4K at 60hz with their new Macbook Pro Late 2016 via usb-c to hdmi 2.0 adapter?
    I heard apple is having some issues and only displayport can truly output 4k at 60hz.
    Thanks!
     
  2. ja09 macrumors newbie

    Joined:
    Dec 13, 2016
    #2
    I haven't found any usb-c to hdmi that claim to support 4k @ 60hz. I've tried two different ones and they both run at 30hz.

    I use two of these DP dongles and they're working perfectly so far @ 60hz. No sleep or wake issues either, like I had with HDMI. https://www.amazon.com/gp/product/B01K51GO26/
     
  3. xmonkey macrumors 6502a

    Joined:
    Jun 30, 2016
    Location:
    CA
    #3
  4. scotty588 macrumors 6502

    Joined:
    Jan 2, 2007
    Location:
    Carlsbad, CA
    #4
    I tried 4k 60hz using this Club3d USB-C to HDMI adapter that supports HDMI 2.0. The only 4k 60hz TV I have access to is at work which is a Sony XBR-65X850A with the latest updates applied. I couldn't get it to work even after comments on the Amazon reviews from Club3d say to use SwitchResX and make a custom resolution with some other specific settings. FYI this requires disabling SIP (System Integrity Protection), which is a bit annoying. I couldn't find any HDMI cables I had laying around that I knew for sure were HDMI 2.0 so this could have been my problem. It did work fine at 4k 30hz though.
     
  5. enzom21 macrumors 6502

    Joined:
    Nov 2, 2008
    #5
    I have this adapter and I am getting 4k@60hz with an LG 27UD68-P. It might be a cable issue in your case.
     
  6. scotty588 macrumors 6502

    Joined:
    Jan 2, 2007
    Location:
    Carlsbad, CA
    #6
    Are you using a custom res with SwitchResX and SIP disabled?
     
  7. enzom21 macrumors 6502

    Joined:
    Nov 2, 2008
    #7
    No, not using SwitchResX. Try this if nothing is working for you.
     
  8. vipergts2207 macrumors 65816

    vipergts2207

    Joined:
    Apr 7, 2009
    Location:
    Columbus, OH
    #8
    It's not just Apple, as the USB-C spec itself only supports up to HDMI 1.4 and not the 2.0 required for 4K@60Hz. However, it does support DP 1.3, and DP 1.3 supports HDMI 2.0. So the way I believe these 4K@60Hz adapters work is by having the computer output DP and then an IC in the adapter converts the signal to HDMI. This could be confirmed by looking at the system information on a Mac using this setup.

    There are several brands of these adapters I've seen, including the aforementioned Club3D, as well as Uptab and Moshi.
     

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