Maybe yes, probably no. It depends on the chipset used by the manufacturer, meaning it will probably only be on very high end products with HDMI 2.0b, whereas HDMI 2.1 ensures an eARC as standard. My reciever from 2017 has eARC with HDMI 2.0. And its not uncommon with soundbars either. For 4k at 120hz. 3840x2160 x 120hz = 995,328,000 pixels. 10K at 120hz is 5.3 times more pixels per second than 4k at 120hz. Even 4k at 240Hz gives us 1,990,656,000 pixels per second which is 2.67 times less than 10K at 120fps. Therefore, why doesn’t HDMI 2.1 version allow 4k at 240hz or 8k at above 120hz?
Goodbye – blank screen. Beside the enhancements that improve picture and sound quality as well as usability, HDMI 2.1 also includes long awaited features for console gamers. Reduce Tearing and Improve Clarity with Variable Refresh Rate (VRR): HDMI 2.1 can support higher frame rates for smoother video, but it also allows variable frame rates.
For now, I have a GTX 750ti with an HDMI 1.4a port. I'm in the market for a new monitor and was considering the Asus XG258Q. I know the 1.4 spec on the GPU wont do 240Hrz. BUT, I'm wondering if I'll get the 144hrz that the 1.4 spec does put out if connected to a 2.0 port on the monitor? Thanks! While up until HDMI 1.3 the saying “all HDMI cables are made equal” was more or less correct, since HDMI 1.4 and the advent of 4K the various data bandwidth of each cable makes a huge difference. To place things in perspective, HDMI 1.3 can pass 10.2Gbps (gigabits per second) and doesn’t support 4K at all. That version of HDMI is now DisplayPort 2.1 also adds bandwidth management and mandated support for VESA's Display Stream Compression (DSC) and Panel Replay technologies. Furthermore, DisplayPort 2.1 certification requires DP40 and DP80 cables to operate at total capacity at lengths beyond 2m (6.6 ft) and 1m (3.3 ft), respectively. Although these additions do not increase
The main difference between the two is that HDMI 2.0 supports a high-bandwidth, interactive display format called 4K, as well as frame rates up to 60 frames per second (fps). This means that you can watch videos at full resolution—unlike with HDMI 1.4, which only supports 30 fps. HDMI 2.0 also allows for audio formats such as Dolby TrueHD and
It works because all HDMI 2.1 certification does is certify that the cable is built well enough to handle the signal at the proper bandwidth. And all HDMI 2.0 says is the cable also hit those minimum standards. Other than quality the actual cable between HDMI 2.0 and HDMI 2.1 is the same.

Monitors with HDR and Freesync that only have display port 1.2 and HDMI 2.0. Troubleshooting. Many gaming monitors ship with refresh rates faster than 144hz with Freesync and VESA DisplayHDR 400 support. Sounds great, but it is common practice for these displays to only have an HDMI 2.0 and DP 1.2 for input. For Example - Acer Nitro VG271 Pbmiipx.

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    • does hdmi 2.0 work with 2.1