Good (mini) DisplayPort cable at reasonable prices appear to be still hard to find. I realized sadly looking for such a, as with my new Samsung UHD Monitor While a normal DP cable was doing, my graphics card but only mini-DP provides outputs.
As expected, the cable does exactly what it should, and the monitor is working so well in the UHD mode (3840 x 2160, 60 Hz) with no problems. Can you hesitate to recommend.