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You can run 4K at 4K, no problem, even over HDMI.
Just add 3840x2160@23.976Hz with SwitchResX (Most 4K content is 24p content).
 
You can run 4K at 4K, no problem, even over HDMI.
Just add 3840x2160@23.976Hz with SwitchResX (Most 4K content is 24p content).

Or you can patch your driver and get 4k at 30Hz (I'm running my mini with a seiki 4k 39")
 
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