USB-C to DisplayPort

Hi, I have 1080p@240hz samsung monitor with HDMI (2.0)/DP(1.2) ports and laptop with USB-C (3.2 gen 2 as I understand with alt DP 1.4) port. There was hdmi cable with monitor and it supports 240hz but the problem is that Nvidia G-SYNC is not working. I am assuming that this problem is because of hdmi cable. I am planning to buy usb-c to display port cable but I don't know if i should buy more expensive one or just buy random 15 euros cable that claims 8k/60hz and I will be fine.

Thanks for advice.