citaj napr. tu http://www.amd.com/us/products/technologies/dual-g raphics/pages/dual-graphics.aspx
funguje to ale asi dokopy len pod Win7

AMD Radeon™ Dual Graphics requires an AMD “A” series APU plus an AMD Radeon™ discrete graphics configuration and is available on Windows® 7 Professional, Windows 7 Ultimate, Windows® 7 Home Premium, and/or Windows® 7 Home Basic OS. Linux OS supports manual switching which requires restart of X-Server to engage and/or disengage the discrete graphics processor for dual graphics capabilities.