Hi Rickamordis,
Thank you for considering this TV Because HDMI 2.1 is a complicated spec, we hope that focusing on TV features will be more helpful to you when deciding on the best model for your usage scenario. The TU690T has 2 HDMI ports, both of which support HDR10+ and Auto Low Latency Mode (Auto Game Mode).
The “HDMI In 2” port additionally supports eARC. If you’re looking for a TV capable of 4K@120fps (FRL), please consider the Q70 Series, which supports “FRL on HDMI In 4”.
~Samsung Advisor