Hi,
Thank you for considering the U7900 for your gaming needs. This model is equipped with 2 HDMI ports, all of which support HDR10+ and Auto Low Latency Mode (Auto Game Mode). HDMI port #2 further supports eARC. you’re looking for a TV capable of 4K@120Hz, please consider a step up to the 55-85” Q8F TV, which supports this feature in all HDMI ports.
~Samsung Advisor