Who has a weak PC. 
download only the reshade and 
my preset at this link https://ru.gta5-mods.com/misc/reshade-preset-for-nve-hardex-gta-vi-realism 
and that's it! If you want more fps and enable fsr, 
then here's a video for you: https://www.youtube.com/watch?v=TYsGn2jsmVk&ab_channel=GTAGamer