Greetings,
If you were to upgrade the card, you would move to Dx12 system. Lots more video processing power and VRam, I have that card. ( Zotac 3060 twin edge OC, 12Gb )
Your running through the HDMI ports on the Tv I'll assume, and the TV is capped at 60Hz for a 1920 x 1080 resolution (16:9)
- with an upgrade, you'll also get better drivers from Nvidia for the card. (many more options and features)
- The Tv pixel pitch is set, so sharpness of image is what your sending it. ( Side note: is your Tv the V version?) V version runs a 3840 x 2160 resolution with active pixel tuning.
- With the upgraded card you may be able to push the screen size (Displayed resolution) higher and still have the processing power to display it. (screen image gets wider, sometimes taller and sharper.)
I run 5760 x 1080, but that's on 3 monitors, so I actually have real side windows in game. Again you may be able to push your resolution.
Just some notes, hope that helps some,
9erRed