iMac dual 4k display
I have a new (early 2016, iMac) and want to connect two 4k (3840 x 2160) displays. I can't find definitive guidance on how to do this. The monitors have 2x HDMI, 2x DP & DVI inputs. Some sources seem to say that HDMI is limited to 1080p...is that just older variants? What adapters are needed for this?
Thanks,
Allen