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Discussion in 'MacBook' started by lbjsong, Nov 12, 2016.
I wonder its graphic card is good enough for one 4k monitor.
It'll work, but you'll only get 30Hz instead of the typical 60Hz, meaning fast moving images/videos would look sluggish.
How so? rMB already gets 4k@60Hz with LG 27UD88 which also offers usb-c connection. Where did you get this 30Hz from?
We're already taking about it here:
It's literally in the product description.
At the HDMI section, it says;
"MacBook (Retina, 12-inch, Early 2015) and later supports these resolutions and refresh rates over HDMI 1.4b using the USB-C Digital AV Multiport Adapter.
3840x2160 at 30 Hz refresh rate
4096x2160 at 24 Hz refresh rate (mirroring is not supported at this resolution)"
That's a limitation of the HDMI spec used in the adapter. When connected via USB-C, 4k/60hz is supported. Any USB ports connected over the same cable will drop to 2.0 speeds.
Use a display with a displayport or usbc connection. hdmi is not appropriate for a computer display.
The new macOS update 10.12.1 allows 4k @ 60Hz, I have the LG 27UD88 and using it now. It supports mirroring or as a 2nd display with the MacBook screen.