^Welcome Liviu! Well, I believe that you did like I did the first time: select the DSR from the resolution list per game, in GeforceExperience (GE). By doing this it lowers all other settings. (Check the horizontal Quality/Performance slider). And yes, then -and only then- it is playable at Super High Resolution, it looks really good, but ... textures, AA, and all these things are lowered. This low res stuff is very easy to see in objects, houses, roads, close to you. In the distance it is all pure joy.
You can test this, by editing the settings back to High or Ultra one by one in GE, or do the same IN the game, AFTER setting resolution to a DSR-resolution. Then your FPS will drop down on their knees!