It's configured to run at the native resolution of the device, and looks good, but I'm not sure it is really at 4k.
Skyrim performs flawlessly, but Baldur's Gate gets sbout 15 fps at this rez, so I have to lower the graphics setting. I'm nesr endgame, so there is a lot of city animation.
Well, i haven't neen much of a gamer for years (got too adicted to WoW), but just started again this year. I am amazed by Skyrim, and am now modding it up.
I also just got Cyberpunk 2077, and will get into it soon.