How do i select my laptop video card?

My laptop has 2 video cards built inside. an intel HD graphics card(****) and a radeon HD graphics card(better). my pc says i have the intel one in use, how do i use the radeon one for game playing? is there a way to select it? Example: i tried playing amneisia and it told me no video card detected -_- please help!|||You have to right click on the desktop, and go into the Catalyst Control Panel. There, you have to manually designate which games should use the Radeon card. Otherwise, there is no need to use it for surfing the net, etc.