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Hi Dev, thanks for your inquiry. The X80J supports eARC (Enhanced Audio Return Channel) on HDMI 3 to allow for Hi-res Audio which is considered an HDMI 2.1 feature. If you are referring to HDMI 2.1 features such as VRR, 4K120, and ALLM, unfortunately, these features are not supported by this TV. You might consider researching our X900H, A90J series, X90J, or A80J series which are designed for these features. These will be supported on HDMI Input 3 and 4. I hope this helps! Erin
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