Estranho, apenas o modelo FX suporta o explicit multiadapter, ou seja a capacidade de usar o iGPU e o dGPU.
Não sei se já tinha sido colocado.
Most noticeably, AMD is offering a whole new high-end commercial mobile chip, which for the first time ever, contains AMD Radeon R7 onboard graphics. The A12-8800B is the first "A12" chip, a name derived from the SoC's 12 total compute cores (4 CPU and 8 GPU). The A12-8800B employs two more GPU compute cores than the previously-top-of-the-line A10 mobile processors, and it has a maximum CPU clock rate of up to an impressive 3.4 GHz.
http://jonpeddie.com/publications/market_watch/AMD’s shipments of desktop heterogeneous GPU/CPUs, i.e., APUs, for desktops decreased 4.3% from the previous quarter, AMD’s shipments were up 30.3% in notebooks.