Hey, these are my first ENB settings for Gta V, Comment and rate fairly :)

You will get an improvement when you install my ENB :
1)Realistic colors
2)Realistic rain reflections
3)New post processing
4)Realistic bloom
5)Realistic water and shores
6)Realistic sky

Installing :
1)Download 
2)Unzip
3)Copy all files to your GTA V directory

My PC :
1)I5 3570
2)RX 580
3)16 gb ram
4)Game on ssd

Full HD and ULTRA options - 40-80 fps