神界2 无法启动。。

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神界后双击运行提示：“the game has detected that you have installed a different version of PhysX.If this is a newer version of PhysX than the one with which the game shipped,this may be fine,butshould you encounter abnormal termination of the game,please visit the support page or contact technical support.”
点击确定之后，再次提示：“Invalid shader model. make sure your graphics card supports shader model 3.0 or higher.”

怎么解决?  更换过PhysX版本。。