I have a hp probook 455 g3 processor with the a10 8700p with radeon r6, on the website of Hp says I can use dual graphics, but only a video adapter appears in the device manager, I can not make it work, somebody help me ?
There are a few options for that model.
The top one marked is not dual graphics (R6 is part of the processor)
The bottom one marked is, as it has an additional graphics chip.
Check with HP support, they'll give you info needed.
It is an additional graphics chip/card, again HP support can supply any relevant info.