Ked sa s tym chces babrat tak si skus jak to pisu
http://www.amd.com/en-us/innovations/software-tech nologies/dual-graphics
v sekcii FAQ

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™ R7 series card. After installation of your graphics card, visit the AMD Graphics Drivers and Software Page, to download andinstall the latest AMD graphics drivers. After driver installation, the option to enable AMD Radeon™ Dual Graphics should become available in the AMD Catalyst Control Center.

Once installed, go into the “Performance” section of the AMD Catalyst 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™ R7 series GPU installed for increased graphics performance.