In general R9 270X is just overclocked R9 270 -.They both have the same number of shaders , texture units ,compute units .R9 270 is easily overclocked and so outperforms R9 270X .Since , GTX 760 is 12% faster than R9 270X and its price is close to R9 270X , i think you d better buy either GTX 760 or R9 270 .