The screen refresh rate (Battlefield 1)

When the screen resolution is 1920x1080 59.94 Hz, the picture becomes a fuzzy, grainy chtoli, but the game runs smoothly. The choice is only 50Hz and 59.94 Hz, my monitor 60герцовый. If you put 50Hz, the picture is clear, but the game starts to freesite, is also not an option. What you tell? Is there a way to make the picture clearer when 59.94 Hz and 60Hz supply?