Really odd problem with GPU display settings with TV

Syntaxvgm · June 20, 2016

So I have this 4k TV. It's a Vizio D55u-D1. I didn't buy it to use at 4k, it had the feature set I wanted, and hey 4k is nice. (13 ms input latency! Yah, a TV.)

Anyway it's only 4:2:2 color at 4k, and that's unacceptable for computer use, but it supports full color at 1080p.

I have a 75FT worth of DMI cable between my desktop and my TV, and it works fine. The cabling is just fine, has no problem even at 4k 60Hz.

The main screen is a 144Hz Gsync display. When I'm using my TV, I prefer to set them both to 4k 60Hz and turn Gsync off (i cant run o n one display and not the other with duplication), and that SHOULD work, but if, and only if, I'm duplicating the screens, the TV receives 30Hz from the computer. It's really odd, it reports 60Hz on both displays, but it's sending 30Hz on the TV and only the TV (it's very clear to see the difference), and if I go through the windows settings and not NVIDIA's it sends a 4k signal to my TV (tv reports 4k, and goes to 4k when I unpair the duplication) when both displays are set to 1080p. When I un-duplicate them, it shows that my TV is running 30Hz interlaced. It's very annoying. If I disable the other displayport display it works fine. Any ideas? Again, the cable is fine, I even tried it with a different short cable. Card is a 970.