I received Dell U2717D as a replacement for a similar monitor. I had hard time getting it to work with my NVIDIA FX 5800 video card. I spoke with Dell support many times and they couldn't figure out why the signal is not getting to the monitor. I tried these different configuration of cables:
DVI at (Video Card) to HDMI at (monitor) ==== I got the the error HDMI signal not detected
DVI at (Video Card)) to DP at (monitor) ==== I got the the error DP signal not detected
DVI at (Video Card) to miniDP at (monitor)==== I got the the error miniDP signal not detected
As shown none of these cables made the Dell U2717D work with my NVIDIA FX 5800 card. Finally, I figured I would try DP to DP cable and use the DP port on the video card (which I never used before). The monitor worked beautifully with this configuration. I wish Dell customer support had more information about this compatibility issue. Nonetheless, it is never too late to add this information to your database.