The three graphics cards mentioned as minimum have so diferent benchmark results.
NVIDIA® GeForce® GTX 460 - 2655
ATI Radeon™ HD 4850 - 1025
Intel® HD Graphics 4400 - 567
www[point]videocardbenchmark[point]net/compare/GeForce-GTX-460-vs-Radeon-HD-4850-vs-Intel-HD-4400/31vs24vs2643
Is the game realy running on HD4400 with 567 points?
And not running on GeForce GTS 450 with 1558 points?