Here's how to prioritize for quality or performance on your Oculus Rift S

[Windows Central]

The Oculus Rift S has a single LCD display with a higher resolution than the original Rift CV1's dual OLED offering, totaling 2560x1440 or 1280x1440 for each eye. However, no matter the panel's resolution, your PC is going to render frames at a higher resolution value, which is known as supersampling. Supersampling at a high value can have a detrimental effect on your VR experience, especially when using a PC without expensive, powerful hardware, but Oculus has included a Graphics Preference setting where you can prioritize for quality or performance.

Full story from the WindowsCentral blog...