At the beginning of this year, the HDMI protocol was updated, adding the upgraded version of HDMI 2.1a standard specification. In October, VESA ( Video Electronic Standards Association ) also brought the new DisplayPort 2.1 specification (hereinafter referred to as DP 2.1) to achieve some performance improvements in video transmission.
However, although it is a new specification, DP 2.1 has no difference from the earlier DP 2.0 in terms of transmission rate caps. The theoretical upper limit is 80Gbps, but they updated the cable specification to improve connectivity and improve cable length without reducing UHBR (Ultra High Bit Rate) performance.
In this cable specification, VESA certified DP40 cable supports up to UHBR10 link rates, which can provide 40Gbps bandwidth in four channels; while DP80 cable supports UHBR20 link rates, which can provide 80Gbps bandwidth in four channels.
In addition, DP 2.1 also strengthens consistency with the USB-C specification and USB4 PHY specification, adds bandwidth management function, and can coexist with other I/O data traffic more effectively through the USB4 link, better supporting the implementation of visual lossless compression technology (DSC).
The good news is that VESA also mentioned that products that support DP 2.0 actually comply with the updated and more demanding display port 2.1 specifications, which means that all previously certified DP 2.0 products have passed the stricter DP 2.1 certification. Friends who have purchased DP 2.0 wires do not have to worry about being "back-stung".
