AMD R9 270X Review
You can really see the difference between the more powerful 280X and the 270X in Sleeping Dogs. 37FPS average on the AMD R9 270X isn't too bad, although we know that just dropping the AA down to 2x would make a huge difference.
We're big fans of the Tomb Raider reboot here at OC3D and you can see why AMD have it as part of their Never Settle bundle, as it performs admirably on the R9 270X. Better than an overclocked GTX760 is not bad going at all, even if the difference is slight.