Technically you need it just poke with my Philips 40 "3840x2160 monitor it works over DisplayPort 1.2 flawlessly without artifacts etc. also at native resolution of 3840x2160 at 60Hz. For the price really great!
A pity, however, that it does not have a plug-lock, as I usually know it from DisplayPort cables. This can be easily pulled out of the socket, but also is less tight in it.
Therefore, there is of me for the cable only 4 star.