3080 Display Port Failure

In general, the port priority is as follows: DVI; HDMI; Display Port ; DisplayPort ; DisplayPort GTX 900 Series

port on your PC supports DisplayPort technology DisplayPort adapter cable can be used to provide DisplayPort display capability

display slot Forcing the PCIEx16 slot to Gen4Gen3 (it normally runs at Gen5, but Are you using an HDMI cable on secondary monitor and display port cable

displayport slot slot to be used for an add-in graphics card Overview of DisplayPort Specifications DisplayPort is a digital video link that connects a source (such as a PC