Laptop only uses APU

Hi,

my laptop is Acer Aspire E 15 (E5-553G-F79R)

specs :

AMD FX-9800P

AMD Radeon R8 M445DX

it never uses my dedicated GPU and only uses APU on anything

I checked with GPU-Z and on the R8 M445DX Sensors tab everything is 0

while on the Radeon R7(APU) the sensors shows.

Already tried reinstalling using old drivers and tried to disable APU but instead the laptop will use Microsoft Basic Display Adapter.

Thanks.