I finally got everything working fine. The stupidest thing did the trick: unplug all cables, hold power button for 8 seconds, then replug and... "magic". Thank you very much for your support.  Kind regards, Sabino
I have a UP2715K monitor connected to an Nvidia Quadro GP100 graphics card running on running on windows 11 (Microsoft Windows 11 Pro for Workstations, Version 10.0.22000). My problem is that I cannot access the 5K resolution when I connect two DP cables to my card, it only allows me to select 4K. In theory, my graphics card can run up to 4off 5120x2880 60Hz displays, so I think it should be able to handle the 5K resolution for this monitor using two cables, although it is not on the official list of approved cards for the monitor (but its supposed to be better and more recent than the cards approved). My Nvidia drivers are fairly recent (516.25). 4k resolutions run fine with any of the cables, so I think this is not a cable issue. The Nvidia control panel "View system topology" tab only shows one connected DisplayPort, even if I have the two cables connected. I have installed the A00-00 monitor drivers and the Dell Display Manager, but this didn't help. I have also looked at this , the user guide, this and this, but found no solution to my problem yet.  I hope you can provide some help. Thanks in advance
UP2715K, Nvidia Quadro GP100, Windows 11, 5K not working