For a desktop, but theoretically it should more or less work the same way.
Q3: I just bought an AMD Radeon™ HD 6000 Series graphics card. How do I configure my PC to take advantage of AMD Radeon™ Dual Graphics?
A3: To take advantage of AMD Radeon™ Dual Graphics, you must use a compatible AMD A-Series APU to pair with your supported AMD Radeon™ HD 6000 Series card. After installation of your graphics card, install the latest AMD graphics drivers. After driver installation, the option to enable AMD Radeon™ Dual Graphics should become available in the AMD VISION Engine Control Center.
Once installed, go into the “Performance” section of the AMD VISION Engine Control Center and check the box that says 'Enable Crossfire™' - this will allow the AMD A-Series APU graphics to work in tandem with the select AMD Radeon™ HD 6000 Series GPU installed for increased graphics performance.http://www.amd.com/us/products/technologies/dual-graphics/Pages/dual-graphics.aspx#4