Hi,
I just got this new Crossover 289k that Wendel from TekSyndicate 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. I have browsed the menu of it as well and cannot find any reference to changing of displayport type. Any help would be appreciated. Thanks.