HDMI 2.0 vs 2.1 vs 2.2: Which Do You Actually Need?
Find out when HDMI 2.0 is enough, when HDMI 2.1 or 2.2 features matter, and how to choose the right port and cable for video, gaming and sound.
Do you need HDMI 2.1 for 4K, or is HDMI 2.0 enough? Start with the resolution, frame rate and sound you want, then check the source, port and cable together. A newer version number alone is not a reason to replace your cable or television.
When is HDMI 2.0 enough?
Its maximum bandwidth is 18 Gbps, allowing 4K at 60 frames per second with compatible signal settings. Colour depth and signal format affect the bandwidth needed: not all 4K60 signals have the same requirements. If your player sends the required signal reliably, moving to HDMI 2.1 alone will not add picture detail.
When does HDMI 2.1 help?
HDMI 2.1 increased maximum bandwidth to 48 Gbps and introduced features including 4K120, VRR, ALLM and eARC. Implementation varies by device and port. Look for the specific feature you need rather than assuming the version number guarantees everything. FRL is a transport method for higher-bandwidth signals; you normally do not configure it yourself.
Getting 4K120: check the whole connection
Check the television, specific input, source device and cable for the required signal. You may need an enhanced input setting, such as Input Signal Plus or Enhanced Format; names and steps depend on the model, so consult its manual. A 120Hz output signal does not mean every game runs at 120 frames per second: the game, performance mode and hardware also matter.
VRR and ALLM: what is the difference?
VRR synchronises the screen's refresh timing with the source's changing game frame rate within the supported range, reducing screen tearing. ALLM lets the source request a low-latency mode automatically; it does not increase frame rate or graphics quality by itself. Check both devices and the required settings.
Connecting sound through eARC
eARC returns sound from the television to a compatible soundbar or AV receiver, with greater capability than conventional ARC. It does not establish 4K120 or VRR support, or guarantee every audio format from every app. Check the eARC ports on both devices, supported formats, passthrough settings and the manuals' cable requirements.
Which cable should you choose?
Use certified category names rather than marketing phrases such as '8K gaming cable'. Premium High Speed is certified up to 18 Gbps, Ultra High Speed up to 48 Gbps, and Ultra96 up to 96 Gbps. Choose for the required signal. Buy from a reliable source and verify certification labels through the official process. Cable length and construction also matter. Connector appearance alone does not identify bandwidth or certification.
Should you replace your existing cable?
Not just because a newer specification exists, if the cable already carries your signal reliably. For flickering or dropouts at a higher signal setting, check port support and settings, reseat connections, then try a suitable known-good cable before buying. Symptoms alone do not prove a cable fault: the port, settings or device may be responsible.
What does HDMI 2.2 add, and do you need it?
HDMI 2.2 was released in June 2025, raising maximum bandwidth to 96 Gbps and adding improvements for higher signals and a protocol to assist audio/video synchronisation in multi-device systems. Ultra96 branding on products can indicate a maximum of 64, 80 or 96 Gbps, depending on implementation; check the actual specifications. There is no automatic need to upgrade if your current connection meets your needs.
A checklist before buying
Balance picture quality against the features you actually need. Check each port's supported resolution and refresh rate, VRR and ALLM if useful, and eARC for sound. Count the inputs remaining after connecting a soundbar, and choose a cable suitable for the distance and bandwidth.
Frequently asked questions
Does every 4K television need HDMI 2.1?
No. Many 4K60 uses work through HDMI 2.0 within the supported signal limits.
Does every HDMI 2.1 port support 4K120?
Do not rely on the version number alone. Check the model and the specific input's specifications.
Do I need a new cable for 4K120?
If your certified Ultra High Speed cable already carries the required signal reliably, you do not need to replace it. An unidentified cable needs verification or testing.
Does HDMI 2.2 automatically improve the picture?
No. More bandwidth does not add detail to a signal your existing connection already transmits correctly.
Does eARC mean all HDMI 2.1 features are supported?
No. eARC audio support does not establish support for 4K120, VRR or the other features.
Does a more expensive cable give a better picture?
Price alone does not determine the result. What matters is reliable support for the required signal and verifiable certification.
Conclusion
Keep your equipment while it reliably delivers the resolution and sound you need. When buying, start with each port's actual features, then select a suitable cable. A higher HDMI number alone does not guarantee a better picture.