When looking at the GPU spec it kind of refers to not supporting 2x 4k screens. 3 max, as we know, with that including the built-in screen. The 'other' screen, being hdmi, is at 30Hz. Do other makes manage 2x4k @ 60Hz with the same cpu?
[h=2]Graphics Specifications[/h]
Graphics Base Frequency300 MHz
Graphics Max Dynamic Frequency1.10 GHz
Graphics Video Max Memory32 GB
eDRAM64 MB
Graphics OutputeDP/DP/HDMI/DVI
4K SupportYes, at 60Hz
Max Resolution (HDMI 1.4)‡4096x2304@30Hz
Max Resolution (DP)‡4096x2304@60Hz
Max Resolution (eDP - Integrated Flat Panel)‡4096x2304@60Hz