Standard gets slight improvements
The Video Electronics Standards Association has finalized DisplayPort 2.1. The standard offers an improvement in image transmission via USB-C. All DisplayPort 2.0 products should also meet the requirements for DisplayPort 2.1.
DisplayPort 2.0 gets an upgrade to DisplayPort 2.1, as announced by VESA. As in USB4 2.0 is the maximum bit rate 80 gigabits per second – on the other hand, 48 Gbit/s are available HDMI 2.1. The DisplayPort protocol can be used in Alt Mode via USB-C. One is new Bandwidth management functionto make DisplayPort tunneling more efficient while allowing I/O traffic over USB4.
The VESA divides the cables for DisplayPort 2.0 and 2.1 into classes DP40 and DP80 – the numbers represent the maximum bit rate in gigabits per second. The cables are available with normal DP connector, mini-DisplayPort and USB-C. The newer cable specifications allow cable lengths of more than one meter for the DP80 and more than two meters for the DP40.
All products previously certified for DisplayPort 2.0, such as graphics cards, docking stations and monitors, are now also certified for DisplayPort 2.1. The new Nvidia graphics card RTX 4090 However, in addition to HDMI 2.1, it also uses DisplayPort 1.4a. At 4K resolution, above 120 Hertz, chroma subsampling is inevitable due to display stream compression. Intel’s Arc GPUs and Ryzen 7000 APUs, on the other hand, can support DisplayPort 2.0 and, as a result, DisplayPort 2.1. However, there are currently no monitors with DisplayPort 2.0/2.1 on the market.
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Tim Metzger 
