What is the max resolution/refresh rate that the HDMI port is capable of? A. The max resolution that the Pro Hub with Ethernet HDMI's port is 4K at 30Hz. Related articles What is the speed of the Ethernet port on the Type-C Pro Hub with Ethernet? Quick Guide and Instructional Manual What is the max pass-through wattage for the Type-C Port? Fixing Ethernet Issues Apple Users, if you are experiencing any HDMI display, Ethernet connectivity, USB, or card reader issues, first complete an SMC reset. Comments 0 comments Article is closed for comments.