The R9-270 wil do it it just wont be pretty. The best advice that I can give you is to look up the benchmarks for the games that you actually play at the resolution that you want to play them at (5760 X 1080) and then make a decision on how much you want to pay for that experience. Two GTX 780ti will get you above 60FPS in some titles on ultra settings but it will also cost $1300.