GPU switch using Laptop

[sossenbinder]

I got a Dell XPS 15 with an onboard GPU and a GTX960 GPU.

When using Windows 10 running a game, it switches automatically to the high performance GPU GTX960. But i can select by hand too within nvidia panel for the exe-file of the game. BTW i can right click on the game icon and choose the high performance GPU.

It works in every game i got, but not working with DC Barbarossa. It ignores my setting and did not use the GTX960.

The engine of the game runs really bay on my notebook. Can anybody help?