Finally a working cable 1

Since my new 4K monitor no DisplayPort cable was there, I had to get EinsExtra me. What was more difficult than expected.
The first two cost models (10) have, unfortunately, failed, 1x only 30Hz at 4K and once every few minutes for 1-2sec image disturbances (black screen).
Did then bought this cable because of the many positive reviews and it works perfectly. A black cable would have indeed liked better, but whatever.

Hardware: Lenovo 2840m, sapphires R9 270x