How to solve this problem?
It's difficult to help with so little information provided, but take a look at this document.
How to Configure Laptop Switchable Graphics
There is no "additional settings" at my radeon. But I tried to instal "catalyst control center" and add the game I wanted to play high performance - still the same problem. In the game my fps drops down to 8 and jumping all the time, inpossible to play :/ When I try video card test - both graphics cards passed, but there was only 6 -15 fps at the test which opened some kind of spaceship at the cosmos...
Well part of the problem is the R7 M260 is not a powerful GPU.
What games are you playing and at what resolution and image quality settings?
Have you verified with the switchable graphics application monitor that the R7 M260 is actually being used?
I'd have done it, believe I tried these... Still the same problem.
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