Application note - Airtop3 - enabling up to 7 displays
From fit-PC wiki
To enable the on-board graphics in an Airtop3 with a discrete graphics card:
- Press DEL during power up for BIOS setup menu
- Chipset -> System Agent Configuration -> Graphics Configuration
- Primary Display: IGFX
- Save and exit
Both on-board DP/HDMI and discrete graphics card ports should be available once Windows or Linux completes boot