No matter what settings I change the display will not allow for a 4k resolution at 60hz. On my PC I have tried installing drivers and changing monitor settings and I checked that all my graphics drivers are up to date and it should support 4k at 60hz. I am also using the included HDMI cable. I am having a different issue on my Xbox one x. When I first got the monitor it allowed for 10bit color but it took the ability away for no reason one day and I can't get it to turn back on. I have HDMI ULTRA HD Deep Color on and the ratio set to original yet no matter what I try it will not support 4k at 60hz on PC and it will not support 10bit color on both pc and Xbox One X.