Catalyst Control Center, enter the first power that one, and then select the "switchable graphics mode", then "manually or under power to select Processor", then click lower right corner of the application.
or
Right-click on the desktop, select the configuration exchangeable video card, and then proceed to check, the check process is that the master to help me get the final set of cut-off figure made up http://ww4.sinaimg.cn/large/505abf45gw1dpzw6v0sicj.jpg