The old bug is back. This was fixed last spring, and the 470-495 series has worked fine. However when updating to 510, the DisplayPort link reported by Nvidia X Server settings is 4 lanes @ 5.4Gbps instead of the earlier 4 lanes @ 8.1Gbps and resolution maxes out at 4k@60Hz.
Hopefully this will be resolved.
Card is a 2080Ti with the Club3D DisplayPort to HDMI 2.1 adapter.