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Hdmi 2.1 is hardware there is no way to add it. The TV has 120hz at 1440p and lower I use this tv for 4k dolby vision movies and 4k 60 fps games Keep in mind that ray tracing and other next gen gaming features require 120fps to be off anyway.
Sorry, there was a problem. Please try again later.TCLs 6 Series supports powerful new HDMI features, including eARC, Variable Refresh Rate (up to 120Hz), an Auto Game Mode and 120Hz HDMI Input decoding and is the world’s first TV with a THX Certified Game Mode, ensuring not only amazingly fast gaming response, but also a great cinematic picture that gamers demand! Hope this helps! Thank you, TCL Customer Support
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