I have a dual monitor setup 1 is a normal 1920x1080 monitor and the other is a 4k (3840 x 2160) LG 27UK650-W. The resolutions are set to the correct one for each monitor. However the LG will flicker off and on for a second. This only happens if I am currently loading something on the monitor (aka a webpage or program). But if I am watching a video/movie or just leave it alone it won't happen. The other monitor also never blinks.