It is not a happy-end story. 2020 models of AVRs from Sound United and Yamaha had faulty HDMI 2.1 chips and did not work properly with HDMI 2.1 sources. Thousands are unhappy owners, recalls and 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. That is where the new generation of HDMI 2.1 steps in. Continue reading to learn what HDMI 2.1 is and how this technology benefits your gaming experience. Or check out ViewSonic ELITE monitors equipped with HDMI 2.1 capabilities for an expanded game setup. Before we move on to HDMI 2.1, it will be useful to understand what HDMI is. 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 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. All HDMI version are both backwards and forwards compatible - you can plug HDMI 1.4 GPU to a HDMI 2.0 monitor and vice-versa - HDMI 2.0 GPU to HDMI 1.4 monitor. The only difference are data rates and some functionalities - while you can't stream 4K@60 with HDMI 1.4, you can do this with HDMI 2.0 devices. The HDMI 2.1 GM VRR will work for 4Kp120 and 8Kp60 resolutions with the new 48G cable, but for lower resolutions/refresh rates, the HDMI 1.4 cable will be enough. True 4k 120hz requires hdmi 2.1 48Gbps. Hdmi 2.0 is 18Gbps and limited to 4k 60hz. You may be able to use 4k 120hz at 8bit and a reduced color of 4:2:0 which means no HDR, so it would impact image quality significantly. oicwhR.