My PC consist of 2 1080 sli, 7700k, & 32 GB Ram. I have a PG348 34 inch Asus 21x9 monitor and just bought a LG 27U69PW. I can't get 4K on LG monitor in Battlefield 1 works fine on Star Wars Battlefront and a few other games that I have tried. I have tried reinstalling the Nvidia drivers. Same problem. When I launch game the resolution is 1920x700 or something like that. I try to set it to 4k and it continues to flicker. My Asus monitor works fine at 3840x1440. I have also tried just connecting the monitor by itself. Any ideas what I can try?