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Using PS4 HDMI 2.0 Cable on PS5 HDMI 2.1 - YouTube
List: 4K TVs and 8K TVs with HDMI 2.1 - FlatpanelsHD
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HDMI 2.1 Explainer: Benefits, Supported Games, And Should I Have It Have For Next-Gen? - GameSpot
HDMI 2.1: Why It Matters for PCs and TVs in 2021 | PCMag