I Have Hp Pavilion G6 1200tx And From When i changed my window from windows 7 home basic to win 7 ultimate my amd radeon hd 6470m graphic stopped working and i have tried drivers from hp official website and amd websites they installs and shows catalyst control center but switchable graphics option not works. i 'm tryin from 2 yrs. but didn't get any succes. and win 7 device managers shows it as 7400m not 6470m. so plz help me.
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