Well it crashed for me aswell, and so does Frontlines fuel of war, and so does The Witcher. Pretty much teh only thing I could play on my M15x was WOW and COD4, although they continually downclocked and FPS dropped off.
Right now there are no newer drivers that work with the M15x beside the AW 167.55.
I also have tried the Update for Gears of War, and it continues with the blue screens of death. I have even tried SP1, system restores and complete fresh install from the AW partition. Until AW get some newer drivers, this is what you will be facing with alot of newer games.