How to setup AMD dual graphics (hybrid crossfire) - YouTube Do all as on that video, but set UMA buffer to Auto or amount equal to your external R7 240
Make sure you have all drivers completely uninstalled, there is a clean uninstall software you can download here
- With only the APU connected, remove the GPU, turn on the computer and install this driver 16.9.2
- Reboot make sure the driver is working well, then turn off the computer and install the GPU.
- Make sure the screen is plugged to the GPU and reboot.
Dual graphics switch can be found in Radeon Settings>settings>additional settings