Do you see tearing in 3D scene or it appears everywhere in the system? Like when you drag the window. I don't any tearing anywhere, actually.The Moshi cable does work as expected! I was getting some tearing (v-sync didn't work) but I think it was confused because my usual display has G-Sync...
Im working with 3D Game engines. do you get tearing in 6k? 1440p seems ok. (GPU is not maxed in 6k!)