I have a new laptop (Lenovo Ideapad FLEX 4-1480 Intel Core i7-7500U) that has both an Intel HD Graphics 620 card and AMD Radeon R5 M430 card. The Intel is currently the default, but the resolution when connected to an external monitor is unbearable! I have spent several hours trying to set the AMD card as default, but cannot figure out how. HELP, does anyone know how to do this? Thank you.
What you can do is this > How to Configure Laptop Switchable Graphics
As far as setting the discrete card as primary and forced to be used exclusively .....only high end gaming laptops have that option, and it's in the bios.