i used 1 gtx 980 ti for 1080p at ultra with gameworks in witcher 3 i got 60-80 fps now i have to gtx 980 ti in sli for 1440p they are giving me 70-90 fps in witcher 3 and don't get 970 in sli because if you sli them 980 ti performs better and don't buy any amd card because if you like gameworks