I have Intel NUC Kit NUC7i7BNHX1 w Optane. I have installed Ubuntu16.04 on it. When connected via HDMI, it works perfectly fine.
I have installed remote VNC on it as I needed to control it from remote location but the speed is very slow. I can confirm that this slow speed is not because of the network as the network is pretty good at both sides.
Is there any settings needed to be done for NUC to make the connection stable.