Hi Guys!
After almost a month trying to get 3840x2160 60hz on my Samsung JU6500 I figure out that the problem is related to the pixel clock limit. If the frequence pass 539,00 mhz on tv, gets me a blue screen with a black bottom bar. I read about that displayport 1.2 has a pixel clock limit of 540mhz what is a problem for me , since my tv needs 594mhz for a full 4k 60hz resolution. Now with 539mhz of pixel clock I get video, but my audio is weird.