Understand HDMI 2.1 and HDMI 2.0 and relationship of bandwidth and 4K resolution

The simple reality now is that HDMI cable bandwidth is an essential consideration. For 4K 60Hz with HDR for gaming and video you need a proper HDMI 2.0 cable with the full 18Gbps, while looking ahead to HDMI 2.1.

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4K HDMI 2.0v 60hz/8K HDMI 2.1v 120Hz Cable HDMI to HDMI Cable for TV Lot

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Certified Ultra High Speed HDMI 2. 1 - 8K 60Hz - 16 ft. (5 m) This 16 ft. (5 m) Ultra High Speed HDMI 2. 1 Certified Cable withstands the daily demands of connecting your HDMI devices. Tested to endure strenuous wear and tear, this durable cable is a must-have for both business and consumer applications. Experience the latest that HDMI 2. 1 has to offer This high performance 8K cable supports resolutions of up to 8K at 60Hz (7680x4620p), 5K at 60Hz, 4K at 120Hz and bandwidths of up to 48Gbps.

Startech 10ft (3m) HDMI 2.1 Cable 8K - Certified Ultra High Speed HDMI

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J&D Ultra High Speed HDMI 2.1 Cable, 2.1 Version HDMI Cable Adapter Support 8K 120Hz 4K Dynamic HDR eARC Dolby with 48Gbps BandWidth for PS5, Xbox

Any HDMI connection can now be labelled as HDMI 2.1, and that's not okay

HDMI Specifications Explained: Resolutions, Refresh Rates, Versions, and Cables - A Comprehensive Guide – Juiced Systems