I've spotted, that i cannot play any game fluently while using my AMD Radeon R9 M265X. If i use my Onboard GPU (Intel HD Graphics 4600) I don't have any problems playing. The problem started with Star Wars Battlefront, it doesn't accept the Onboard GPU (cannot leave "press enter" screen), opening the game with my AMD GPU results in horrible laggs, already on the start screen.
Is anything similar known, or do you have any suggestions to solve the problem?
p.s. German answers are welcome aswell