Set Display Resolution to 3,840 by 2,160 (it should say "Recommended" in parentheses next to it). This will ensure your PC is outputting a 4K signal. Now, launch a game and enter its display settings.
4K resolution is now within reach of everyday ... brightness and excellent color performance with high color accuracy. Images are vibrant and true to life. Yet there’s more to the Dell U3223QE ...