i have enabled 2x  and 4x in nvidia control pannel so more or less 4x  should be fake 4k, but its not working at all. i am able to choose  3840 resolution in video options but actual quality is not changing in game, i have above average trained eyes for these details , 100% sure about it so no room for error on my part.

my monitor supports 1920x1080

anyone knows is it possible to make this work? is dsr scaling actually working for you?

had same problem in endless legend. on paper i have 3840, but in reality i have exactly 1080p as before, 0 change.

when i choose 1650 resolution and then switch to 3840, screen becomes 1080p again