What Bandwidth will i need for 4k High Frame Rate

Hi I currently use splashtop with resolutuion of 1920x1080 on High Frame Rate and it works great. My question is though if I want to remote a 4K host at High Frame rate, what sort of bandwidth will i need for it to run smooth?

I current have 50/15Mbps Internet Down/Up on both ends and under 10ms

Is there a tech out there that can tell me the kind of bandwidth 4K might consume?