My laptop has a the AMD R7 512B and the AMD R7 M340 2GB, the primary video card is the AMD R7 512B, however I am not able to switch it with the R7 M340 2GB in the AMD Adrenalin driver 18.5.1, is it possible to switch those graphic card because the R7 M340 is just doing nothing although i had turned on and off the AMD Crossfire mode