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FeedbackJar

macrumors newbie
Original poster
Sep 30, 2009
2
0
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!
 
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/
 
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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.
 
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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.
I have this adapter and I am getting 4k@60hz with an LG 27UD68-P. It might be a cable issue in your case.
 
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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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