I have a dell inspiron 15r - 5521 (i7) laptop. I have both amd radeon hd 8730m & intel hd graphics 4000. But games like assassin's creed and gta IV are not working properly. The graphics is lagging too much. But these games are played well in my friend's laptop with the same configuration. I configured the switchable graphics to high performance. I also tried installing all the latest drivers for graphics, but still the problem remains... So kindly help me..
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