With my AMD kaveri a10-7850k and R7 250, while I have not been able to get dual graphics to work yet (R7 250 still says disabled), I wanted to know if my other option for fully utilizing the potential of the APU is to use HSA. I have Radeon R9 Gamer Series memory in dual channel on my Asrock A88 ITX+ board.
Can HSA be utilized with Dual Graphics or do I have to decide between the two? I see in my Bios that IOMMU is currently disabled. How do I get the most out of the Kaveri APU?