How do I test my HDMI port?
Checking HDMI Port Version Through Trial and Error Plug in your monitor to the HDMI port on your laptop. Make sure you are using an HDMI 2.0 cable (Premium High Speed HDMI cable at least). If the monitor runs at 4K@60Hz, then you have an HDMI 2.0 port. If it runs at 4K@30Hz, then you have an HDMI 1.4 port. …