system
A chat on subreddit /r/pcmasterrace
human
I'm sure it goes without saying but this is reddit, so lets cover the bases.  


If you use an adapter for the inputs it will be limited by the smallest bandwidth.   


So if you don't have a display port available and you use an HDMI 1.4 adaptor than it will still only be 120hz
gpt
Actually, not the case here, but the cheap passive adaptors will limit even lower. They can do 4k at 30Hz. Only active adapters go to 4k, 60Hz. Especially with HDR on.