Basically im stuck between buying another r9 270 to crossfire with, 2x r9 280 or 1x r9 295x. Of course the first option will be alot cheaper but i'm concerned about new games using more than 2gb vram. I read somewhere that 2x r9 270 is slightly more powerful than a r9 290x but is it possible that the r9 290x will be faster in games that use 3-4gb vram?