Bandwidth & Performance: HDMI 2.1 supports up to 48Gbps—ideal for 8K and high frame rate 4K. HDMI 2.2 doesn’t exist; it’s likely a mislabeling of HDCP 2.2.
4K & 8K Support: HDMI 2.1 handles 4K at 120Hz and 8K at 60Hz with ease. HDCP 2.2 simply ensures protected 4K content plays securely.
Gaming Features: HDMI 2.1 introduces Variable Refresh Rate (VRR) and Auto Low Latency Mode (ALLM)—a must for serious gamers.
Audio Advancements: HDMI 2.1 includes eARC (Enhanced Audio Return Channel) for full-resolution audio passthrough, perfect for Dolby Atmos setups.
Compatibility Check: Ensure your devices and cables are HDMI 2.1 certified for full feature use. HDCP 2.2 is just a content protection standard.