Hello! I currently have a 280x in my system and would like to game at 4K in the future, would it be more worth it to get a second 280x? will they scale better than one 290x or a 780ti? I would like to think that it would get better frame rates than the single better GPU, I understand that it's sometimes better to go with one powerful GPU to avoid tearing or any other annoyances but i have been looking around and i cant find a comparision of 280x's in crossfire vs another stronger GPU and i just want to know about frame rates. Thanks!