Resolution not filling out the screen properly!

[BladeOverHeart]

So I decided to pick Civ 5 back up and reinstalled it onto my computer and proceeded to boot it up. I tried to set the resolution to 3840x2160 and when I did it didn't fill out the entire screen. I'm left with a square box with large black bars around it. The only way the resolution will fill out the screen entirely is if I set to 1920x1080. It also doesn't matter if I set it to fullscreen or windowed mode. I've tried running on all direct x versions, tried configuring the ini files, and setting launch options as well but nothing seems to work.
I'm running windows 10 64bit.
intel i7-4770 cpu
gtx 980ti
AOC 4k Display monitor

[SamBC]

Are you judging that just on the title screen? If so, trying actually playing the game - the title screen background doesn't stretch to fill the screen.

[BladeOverHeart]

Originally posted by SamBC:

Are you judging that just on the title screen? If so, trying actually playing the game - the title screen background doesn't stretch to fill the screen.

WOW! I just spent various hours over the past few days searching through threads for a solution and all I had to do was play the game! Anyway, thanks for the tip!

[Mikestriken]

NOOOOO NOO NOOOOOO! GOD NO!!! NOOO! I SPENT THE BETTER HALF OF THE ENTIRE DAY RACKING MY BRAIN ON THIS ENIGMA ONLY TO FIND THAT IT'S JUST THEM MENU!!!!!!!!!!!!! NOOOO..... NOOOOOO, NO NO NO NO NOOOOOO! WHY!!!!!
1 second later:
Ok, Civ V in 4K! efin finally! *rubs hands together malevolent matter*

[Wagyu]

Know that your sacrifice has helped others brother.