I too use a Nvidea Card.
About a month ago I got the "jaggies" after doing nothing at all to my settings. Very frustrating. I checked my setting and rechecked my setting and could not figure it out. I lowered my settings in game (always played maxed out) then the jaggies went away. A few days later maxed out my settings and still no problems. Weird stuff
I guess that was my cards way of saying pay attention to me