You can find a guide in the link below to use Nvidia experience software to fine tune your settings in MSFS. Nvidia has 9 presets available in place of 4 for msfs. It manages 9 by combining low, med, high and ultra settings in a single preset rather than using the MSFS presets of all low, all med, all high or all ultra. You will probably always get a better result by fine tuning each and every MSFS graphics setting individually, but using the Nvidia experience gets you a reasonable set of settings pretty easily.