Hi Freddy,
With HDMI 2.1 being such a complex topic, we feel it’s clearer to highlight the specific features supported by each TV model. The U8000F has 3 HDMI ports, all of which support HDR10+ and Auto Low Latency Mode (Auto Game Mode). HDMI port #2 further supports eARC. If 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.
The U8000F TV will upscale everything to 4K, so even 8K content can be played but displayed in 4K. For the best results and smooth upscaling, use a Premium High-Speed (Ultra High Speed) HDMI cable, HDMI 2.1 certified.
~ Samsung Advisor