lillo9546 I have a NUC8 but the i7 version. Do you find it comfortable to use? I can't use it for more than 20 minutes without developing symptoms. I can force myself to use it for longer periods but it makes me feel a bit spaced out.
AFAIK the Intel driver enables dithering automatically for 8bpc> displays. There is no user controllable way to switch it on/off, so right now we can't confirm or deny it is dithering that is the cause (but I'm running a PWM-free monitor, so PWM, low blue light etc is taken care of, the only other cause I can think of is dithering).