SAMSUNG QLED Q80R 4K 120HZ 2019 Refreshrate questions

[user7jFvAzoKvv]

i wnat to know if the samsung QLED Q80R 2019 is capable of gamming at 4k 120hz and does it have the VRR also the HDMI 2.1 . i want to buy the new xbox series X and use all of it's power (not game at 1080p at 60hz) if not is the Xbox SS a good alternative i don't want speed more money and not use all of it's power.

thanks. 

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[userENbxbtjW2u]

 I have a Samsung Q80R with One Connect and now aftera latest PS5 update, I see 120Hz as supported b ut the chroma is set to YUV420 which is sad. 
I am ok with 60Hz but needs those lost colors and now I cant set it back to YUV422 like earlier 

[userSaP16MVcEw]

Have Q80r without One Connect. Is it possible to install One Connect on my model so I can get hdmi 2.1 to get the most out of my xbox series x? Or is there any talk about a future firmware update to upgrade my hdmi from 2.0 to 2.1? Thanks