Do you have the latest drivers? Check your radeon drivers for what is detected. Click on system and look at graphics chipset. Note some laptops require power plugged in to use the dedicated card. Also you may have to select the primary card in radeon drivers.
for everyone that has a problem always always ALWAYS make sure in the switchable graphics option the dedicated gpu is used along with high performance to make sure the d-gpu is engaged instead of the i-gpu