so I built a new system, witha R5 2400G and a RX 480, now trying to get the drivers for the GPU, but when I download the adrenalin drivers for RX 480, the setup says "Unable to find drivers for your system". (The drivers already installed are for chipset, it did not work before i installed chipset drivers either)
What i can see, is that if you try to install the 2400g driver, the operation go right.
So we can assume that the principal gpu is the apu.
From the Bios you can disable the apu and use only the dGpu with the right driver. for example i use the apu for a second monitor, so i can't do that.