I seem to be limited at 4k 30hz over my HDMI cable. I tried getting an HDMI 2.0 cable and I am still limited to 30hz so I am guessing my laptop has HDMI 1.4. Anyway, I have two other ports: "USB 3.1 gen 2 Type-C" and "Dual-Mode Mini DisplayPort". Does anyone have any experience on getting 4k 60HZ with either of these ports. My monitor has HDMI and DisplayPort so either of those are options on that side.