Dell Inspiron 5520 :: Setting A Default Graphics Card?

I just bought a new Dell 5520 with switchable graphics. It has 2 graphic cards:

Intel (R) HD Graphics 4000, and
AMD Radeon HD 7670M

Now, here is my problem, whenever i try to run any game I have to switch to the ADM card. But some games ask to choose a Graphics Adapter at which point I can only select the intel HD Graphics Card and not the AMD one. I tried to set High Graphics setting with AMD Catalyst Controller but the game does not seem to detect it. What do i do?? Is there any way I can select AMD card as my Default Graphics Adapter?