From th'internet, that laptop appears to have a thunderbolt port; you should presumably be able to use a DP1.2 adaptor and get 4k at 60hz. Or _maybe_ a Thunderbolt monitor like the above 60hz 5k one, though definitely check before buying.
That's why I said over HDMI. Sometimes it's all that available, either because it's a TV or due to a missing cable. I find those USB-C to DP cables pretty flaky.
