Grass (texture) flickering issue (Far Cry 3)

Such a problem, when I look through the scope, well, or even so, the grass or even textures, they flicker, on the screen there is not particularly vindo like this distant grass, which in the sight it flickers strongly, as if it were moving from the wind or the shadows were blinking I don’t even know exactly, video GTX 560 ti, the latest drivers, the game license is Steam, flickers on any graphics at any screen resolution, game version 1.05, tell me what it can be, nothing like this has ever happened with this game.