It has been proven several times that those games that are under the TWIMTBP program, tend to run strange on AMD hardware, but not enough to make the game unplayable. Lost Planet 1 when it was released, ran like crap on the HD 2900XT, during time it got improved thanks to better drivers, the same thing happened with Need for Speed Shift 1, but got fixed with a patch, Batman AA also got fixed on the GOTY edition. HAWX 2 and Lost Planet 2 simply uses Tessellation in a innefficient way that simply kills the performance on AMD hardware when Tessellation is used, and yet, I scored over 86fps with HAWX 2 maxed at 1920x1080 on the benchmark, not a big deal. Lost Planet 2 was barely playable at max settings, that game is severely crippled on AMD hardware.