1. Be sure you have the latest patch installed. All optimal settings are designed to run on the latest version of the game.
2. Be sure that you have the latest drivers installed. You can check for and download drivers in the Drivers tab within GeForce Experience.
3. Disable any third-party tools and background applications such as anti-virus software.
4. If performance or quality are still poor, please file a bug using the "Send Feedback" button in the application. Include details such as the level and area of the game you're playing and the average framerate you are seeing.