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HDMI 2.1 can unlock better graphics on the Xbox Series X and PlayStation 5.

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HDMI 2.1: What you need to know - CNET

When Do I Really Need HDMI 2.1 or Is HDMI 2.0 Enough?

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HDMI 2.1: Why It Matters for PCs and TVs in 2021

HDMI 2.1 explained: what it does, and why PS5 and Xbox owners want it on their next TV

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