Question DisplayPort works only in BIOS ?

May 29, 2022
I'm trying to add second display to the PC. All my displays are not new, so I have an issue with connecting them to the PC. I have only 1 HDMI port available, so I'm using DVI-DP cable connection. On reboot, in BIOS only 1 monitor works(which is connected to the DP), but during the OC load my monitor switch and now works only HDMI connected.

This issue appears both in Ubuntu/Win 10. Assuming to xrandr none of DP are connected. Win 10 also doesn't see the display.

I have RTX 3060 with latest drivers on both systems and updated bios to latest trying to solve the issue.
This could help - when DP is connected the resolution in BIOS is scaled to 800 x 600.
I have no clue what could be the issue. Maybe DVI-DP doesn't fit ?