Our synthetic benchmark testing was the first time I had a chance to put the R9 270X Gaming 4G to the test compared to its 2GB brother. In the 3DMark 11 Performance and Extreme benchmarks the difference was only slight at best with the results being within 30 points. In 3DMark Fire Strike benchmarks the difference was a little more noticeable with it being closer to a 100 point difference. Unreal Heaven Benchmark 4.0 the memory improvement was just under an FPS, but this was enough to jump the performance of a few of the other overclocked 270X’s. Sadly none of our benchmarks test in resolutions over 1080p where the difference would be more noticeable, but even so you can still see it slightly.