HDMI 2.1 vs HDMI 2.0 cables on max effective data rate is a similar wash, with HDMI 2.1 supporting up to 42.6 Gbps, whereas HDMI 2.0 manages just 14.4 Gbps. All that additional bandwidth opens up the HDMI standard to higher resolutions and refresh rates than it ever had before, making it much more competitive with DisplayPort 1.4 and 2.0/2.1.
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22666 posts · Joined 2004. #10 · Feb 12, 2021. ARC is part of the HDMI options sets up to HDMI 2.0. Technically speaking, eARC is an option of the HDMI 2.1 option sets but is possible on the HDMI 2.0 chipsets if that feature has been initiated by the device mfr via a firmware upgrade. Not all mfrs are willing to do that.
Thankfully unlike the mess that the HDMI forum created with HDMI 2.1 where everything could end up being certified as “HDMI 2.1”, VESA will still be certifying devices under the older DisplayPort 1.4, and even DP 1.2, schemes where applicable or required. Not everything is going to be certified as DP 2.1, which would have left consumers to
It may not seem like there is much difference between HDMI 2.0 and HDMI 2.1, but the latter technology brings some significant changes to the audio/video interface. We’ve reviewed both to help you decide whether or not it’s worth upgrading your HDMI cables to the new standard.

It can transmit audio signals as well. It is capable of handling most resolutions. HDMI is the choice to connect your pc into the tv. HDMI 1.4 can display 4K at 30Hz while HDMI 2.0 and above can display 4K at 60Hz. Also, it is backward compatible with DVI. There are also HDMI cables with ethernet support as well. Comparison Chart

\n\n\n\n difference between hdmi 2.0 and 2.1 cable

It nearly triples the bandwidth of HDMI 2.0, defining a maximum speed of 48Gbps, compared with 18GBps. For 4K TVs, that means an HDMI 2.1 connection can handle 4K video at up to 120 frames per second.

HDMI 1.4 supported 4K resolution at 30 FPS, while HDMI 2.0 raised the bar to 4K at 60 Hz or 8K at 30 Hz. The latest HDMI 2.1 standard takes it even further, enabling 4K resolution at 120 Hz and 8K resolution at 60 Hz. Impressively, HDMI 2.1 can even support resolutions as high as 10K.
Most newer copper HDMI cables reach around 15 to 25 ft (5 to 7.5 m). HDMI cables made with fiber optic can reach much farther. On average, fiber optic HDMI cables can reach around 50 to 200 ft (15 to 60 m). Below are the three types of copper HDMI cables with their average length limits and resolutions they can handle at their max cable length The 8K HDMI 2.1 cable supports a higher bandwidth of 48 Gbps, 8K resolution, and 120Hz refresh rate, with advanced features such as Dynamic HDR and gaming enhancements. In contrast, the 4K HDMI 2.0 cable offers 18 Gbps bandwidth, 4K resolution, and 60Hz refresh rate without the advanced HDR or gaming benefits. IerAia.
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    • difference between hdmi 2.0 and 2.1 cable