There are multiple reports that the Display Ports on NVIDIA GTX 1080/70 GPUs don’t work with HTC Vive, even previous generation card’s Display Ports has support for HTC Vive.
Tom’s Hardware reported this issue; they have tested this for themselves after reading reports of this issue on the NVIDIA Geforce Forums. This is very disappointing as NVIDIA’s GTX 1000 series GPUs are advertised as the perfect graphics card for VR. The is a huge bummer for consumers who assume that adapting from DisplayPort to HDMI works.
NVIDIA didn’t talk much about this issue and just stating that they “are still investigating this issue” over a month ago, but still no fix in sighted. At this time, we do not know if NVIDIA is currently working on a fix for this issue in an upcoming driver update.
Right now if you hook in your HTC Vive into your GTX 1080/70 GPUs using DisplayPort, you will simply get an HMD not found an error, preventing VR users from playing their games.
Although both the GTX 1070 and GTX 1080 have a single HDMI 2.0 connection on their reference design, still there are a lot of gamers who are using this connection to connect to monitors, TVs or other displays, so they cannot connect to their VR HMD through DisplayPort an annoying issue.