You should get 2x R9270X or if you have money R9 280X. There is no game that will not run smoothly on R9 270X Crossfire on max settings (1920x1080 with 4xAA). For 2160x1440(1600) with 4xAA you will need to have R9 280X crossfire for maximum performance. You can play games, and while you sleep or are not at home you can mine LTC.