It is recommended that Texture Filtering - Quality be set to High Quality on medium and high-end systems, and High Performance on low-end systems under Global Settings. For particular games where you have performance to spare, you can select High Quality, and for those which are more strenuous, you can select High Performance under Program Settings as required. I can see no real reason to bother with using the Performance or Quality options for this setting, given the performance and image quality difference is extremely small even at the extremes of High Quality and High Performance. It's best just to use High Quality if you prefer the highest image quality, or High Performance if you prefer a potential performance boost. Additionally, there's no need to adjust the Texture Filtering - Anisotropic Sample Optimization and Texture Filtering - Trilinear Optimization settings separately; use this setting as your primary control over texture filtering and allow those to be adjusted automatically by this setting.