GPU-intensive applications should be rendered on the more powerful discrete card.

The command xrandr –setprovideroffloadsink provider sink can be used to make a render offload provider send its output to the sink provider (the provider which has a display connected).

xrandr --setprovideroffloadsink radeon Intel

xrandr --setprovideroffloadsink 1 0

Use your discrete card for the applications who need it the most (for example games, 3D modellers…) by prepending the DRI_PRIME=1 environment variable:

DRI_PRIME=1 glxinfo | grep "OpenGL renderer"

returns

OpenGL renderer string: Gallium 0.4 on AMD TURKS