On what? On which OS? Using which graphics?
Provide the motherboard model number? Does it have 3 outputs on the back?
Which OS? Windows 10? Which VERSION? 1903?
Using what graphics? Onboard or add-on?
Provide detailed information?
I still need the version of Windows 10. And, although we might be able to help, you really need to contact the motherboard manufacturer about their board capabilities and BIOS settings. Who made your PC? Unless it is home made, it has a model number and manufacturer label somewhere.
Download, run, and ATTACH the results of this utility: