Render Scale Settings for Low Image Quality Loss and Moderate Performance Gain:

Preferable Resolutions:

1152x648 = 746,496 Pixels (Balanced) [4% Performance Gain]

960x540 = 518,400 Pixels (Low) [7% Performance Gain]

720p Render Scale Setting:

1280x720@81% = 746,496 Pixels

1280x720@56.25% = 518,400 Pixels

1080p Render Scale Setting:

1920x1080@36% = 746,496 Pixels

1920x1080@25% = 518,400 Pixels