Question How to pick or change which one of my two gpu's is the main graphics adapter on a ASRock b450 mobo?

[varu]

I didn't find a way in the latest bios version. This causes problems to me with softwares and games prioritizing the wrong gpu's monitors and I can't reverse the settings. I want to use two gpu's for a multimonitor setup not crossfire/sli.

I tried with two amd ones and then amd &nvidia. On both tries clean installed correct drivers first, but still games wont launch on the gpu that I want them on, also obs prefers the wrong one and causes a black screen when trying to screen capture. This problem isn't on the games' settings end and onboard iGPU is disabled for sure.

 

[Lutfij]

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

Why, might I ask, are you trying to run multiple GPU in your system?