I need to get a display port cable for mine. can't run more than 60hz through HDMI without it flipping out. I recently got a 0.8ms refresh rate 27" 240hz monitor after my POS 27" Samsung took a crap out of the blue. I probably could have fixed it because I'm pretty good at fixing electronics but but it had absolutely horrible refresh rate. Tested it online and it was rite at 16ms which is worse than my old assed 55" Samsung Plasma TV. My old assed TV tested rite at 12ms which is pretty respectable for an old TV.
Gota be careful when buying cables, especially display port and USB-C cables. Do not buy a cheap one and make sure that you get one that is DisplayPort 1.4 VESA certified and has a crap pile of good reviews. The cheap cables are often rebranded Displayport 1.1 cables that have very little shielding and very very thin wires. You won't get more than 60hz out of a cheap cable.