For GPUs outside the minimum spec (i.e. GeForce RTX 20 Series), and between minimum and recommended (i.e. some GeForce RTX 30 Series GPUs), the easiest path to better performance is to use GeForce Experience. Simply download the latest game ready driver (527.56 WHQL), find Portal with RTX, and click “Optimize” to automatically configure the best combination of image quality and performance settings for your GeForce RTX 20 or 30 Series GPU.
Alternatively we have prepared some recommended graphic settings charts to help guide you to higher frames in your play experience. To adjust your graphics settings in-game, press Alt-X to open the Remix graphics window: