Go into BIOS (press “DEL“ repetitively on boot)
Open advanced tab
Select AMD CBS
Select NBIO Common Options
Select GFX Configuration
Set iGPU Configuration to: UMA_SPECIFIED
UMA Frame buffer Size option will appear, set it to the desired size
Size options:
Auto
64M
128M
256M
284M
512M
80M
96M
768M
1G
2G
3G
4G
8G
16G
Manage space
Manage content
Integrations