since i got mine gtx 980 am getting some very strange like shuttering/lag sort of thing while am trying to play bf4. at 1st for 10- 15 mins its ok and then all the sudden its like you got no control over the the direction you moving when you are pressing w,a,or d,s on the keyboard and on the old times i get direct x funtion errors. its been like this since i installed the gtx 980 .my old card 780ti had no problems with. i did a total clen install of drivers,unistalled my mouse (roccat kane) and installed an new mouse g502 but the problem still there.is there an problem with the 980 card ?