If you've been looking to experiment with this, navigate to Change resolution under the Display section on the left panel in Nvidia Control Panel. You can now set a custom resolution, refresh rate ...

Despite some issues with black screens, the Nvidia app has been fairly stable since it was released. Nvidia is slowly moving ...

You can set the render resolution ... level of control beyond choosing Performance (50%), Balanced (58%), or Quality (67%). This NVIDIA App update also adds legacy Control Panel features, namely ...