DisplayPort 2.1 Issues with UHBR80Gbps Standard and Cable Length

TapTechNews May 18th news, the most notable of the DisplayPort 2.1 specification is the UHBR20 standard with a maximum of 80 Gbps, and it is also currently the only connection standard in the world that does not require Display Stream Compression (DSC) technology to support 4K 240Hz monitors.

However, there are several problems in promoting the UHBR 80 Gbps standard, and the biggest problem is the cable length. TapTechNews queried the VESA database, and the maximum length of the UHBR 80 Gbps certified cable is currently only 1.2 meters (3.9 feet), and many cables are only 1 meter or 0.8 meter.

The cable length used by mainstream computer users is about 2 meters. When the monitor is placed on the desktop, a 2-meter-long cable is sufficient to connect to the computer placed on the floor. And a 1-meter cable is usually suitable for laptops or mobile devices, and if a desktop uses a 1-meter cable, it may need to be moved to the table.

At present, only very few people can use graphics cards and monitors that support UHBR20 - AMD's W7900Pro graphics card has only one DP80 port (that is, DisplayPort 2.1 UHBR20), and the others are DP54 (DisplayPort 2.1 UHBR13.5), and the number of people who have monitors that support DP80 may be even less.

The cable manufacturer needs to be able to manufacture UHBR 80 Gbps cables longer than 1 meter, but the consequence of this is to cause artifacts or signal loss.