Hi,
I just got this new Crossover 289k that Wendel reviewed. I have connected it via displayport to my GTX 770. Displayport 1.2 is advertised to be able to do 4k 60hz and both my monitor and the 770 support it. I am using the Amazon basics displayport cable which is displayport 1.2. The best I have gotten is to have 4k 30hz. Any help would be appreciated. Thanks.
Edit:
Changing the timings at 4k with displayport shown here https://forums.geforce.com/default/topic/923569/gtx-770-can-t-get-4k-60hz-with-recent-drivers/
will allow it to work