2160p fps:s are mostly under 30 even with r9-290 so you would better have two of them. And this card is ment for fhd gaming, and yes 128bit is too low. Benchmarks are all over the place. On FHD where higher bandwidth/vram is needed this plums near gtx660(AC:U) but when it does not it even beats r9-280x(civ:be).