A Resolution Issue:
First, I set Display No scaling in NVIDIA Control Panel.
It works in all games I play including GW2 dx9 mode, and I like to set the game resolution to ultra wide, 2560*1200 for example.
Though my screen resolution is 2560*1440 so there would be black boader on the top and bottom, but the ultra wide experience is really good.
But in dx11 mode, when I set the game resolution lower than screen max resolution, the image is forced to scale to full screen.
It's really disappointing for me.