The cable you have chosen is only designed for Displayport 1.2, this old standard supports Full HD at 120 Hz (1920 x 1080), but 4K only at 30 Hz. It is better to use a cable with the current Displayport version 1.4, which supports everything you can currently connect and, if you look closely, is not necessarily more expensive than this cable. Take this cable from Roline, for example: Roline DisplayPort v1.4 8K (3m, Midrange) It's not a premium cable, but the DP 1.4 standard still guarantees better performance than DP 1.2 premium quality, even if only listed as midrange. The absolute top DP 1.4 cables are Vesa certified and about twice as expensive.