i have exactly the same issues with icue... blacksreens!
My System is
i7 4930K // 2x 980ti // 32GB Ram // Latest Windows 10 // VoidPro USB // K70 RGB Keyboard // K65 RGB Pro Mouse
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i can't reproduce the problem, It seems to occur sporadically. sometimes when i use photoshop it causes in a lag and freeze, then my monitor turns black! in the event display i get the warning: The display driver "nvlddmkm" no longer reacts... sometimes if i look at some videos on youtube i get the same issue...
uninstall icue helps me to get no more blackscreens! Is there any chance to get the latest CUE2 version again?