hei guyz i want to buy a new gpu...after some searching these cards seems good for me (gtx 650 2gb ,hd 7770 2gb ,gtx 650ti 1gb,hd 7790 1gb) please suggest me a good gpu between these four and also a brand of that gpu which u suggested ...........i have intel pentium g620 and want to play ac4,ac3,bf4,bf3, like games on 1366×768 res .....thanks in advance