Why do you need two DP cables? Is there not enough bandwidth in a single one? I use a 4k@60 display, which is the maximum my cheap Anker USB-C Hub can manage.
Reddit also seems to have some people who have managed to get 144 with FreeSync, but I've only managed 120.
Funnily enough while I was typing this Netflix caused both my monitors to blackscreen (some sort of NVIDIA reset I think) and then come back. It's not totally stable!
This is likely a cable issue. Certain cable types can't handle 4k. I had to switch from DisplayPort to HDMI with a properly rated cable to get past this in the past.
It works up until too many pixels change, basically.
Had the same issue at 4k 60fps, it mostly worked but the screen flashed black from time to time. I used the thickest cable I had lying around and it has worked fine since.
Interesting. I've been running my 4K monitor at 240Hz with HDR enabled for months and haven't had any issues with Display Stream Compression on my 4080.
For me it's a small issue with full screen (including borderless iirc) games causing the display to black out for a few seconds.
I don't think it's an issue until you notice. I only noticed because I toggle HDR for some games and at 1440p240hz, the difference is just enough to not need DSC
