Version and / or Patch Used: 1.1
Developer Homepage: http://www.futuremark.com
Product Homepage: http://www.3dmark.com/3dmark11/
3DMark 11 is the latest version of the world's most popular benchmark. Designed to measure your PC's gaming performance 3DMark 11 makes extensive use of all the new features in DirectX 11 including tessellation, compute shaders and multi-threading. Trusted by gamers worldwide to give accurate and unbiased results, 3DMark 11 is the best way to consistently and reliably test DirectX 11 under game-like loads.
Starting off with 3DMark 11, we can see the strong performance gain over the lower-end R7 260X model.
Compared to the $50 more expensive GTX 760, you can see that performance isn't too separated - especially when you consider that the R9 270X is a good chunk cheaper.