Table Of Content
Table Of Content
More than three years after the DisplayPort 2.0 standard was born, the VESA organization has officially released the DisplayPort 2.1 standard specification (hereinafter referred to as DP 2.1). This time, I did not make a big fuss about the bandwidth, but it was firmly combined with USB4. In addition, the Thunderbolt interface is also in the same form, and it is becoming more and more unified.
DP 2.1 has been connected with the USB Type-C specification and USB4 PHY specification at the bottom layer, so that DP and USB4 interfaces can share common PHY physical layer services. At the same time, DP 2.1 adds a new DP bandwidth management mechanism, coupled with VESA’s DSC (Display Stream Compression) encoding, and Panel Replay (Panel Replay) functions, it can be realized on the USB4 connection, DP tunnel and other I/O data transmission efficient coexistence. Among them, DSC encoding can reduce the DP transmission bandwidth by more than 67% without affecting the image quality, and the panel playback function can reduce the DP tunnel packet transmission bandwidth by more than 99%. The ROG X670E motherboard has combined DP and USB4
DP 2.1 also upgrades the data line specification synchronously. The first is to extend the length. The DP40 data cable can exceed 2 meters, and the DP80 data cable can also exceed 1 meter, without affecting UHBR performance. Secondly, the certified DP40 data cable can support up to UHBR10 10Gbps, and the combination of four channels is 40Gbps; the DP80 certified data cable supports UHBR20 20Gbps, and the maximum of four channels combined is 80Gbps. At both ends of the data line, there will be DP40 or DP80 marks, which is convenient for users to distinguish. In terms of product certification and compatibility, VESA stated that DP 2.1 remains backward compatible, and all previously certified DP 2.0 products comply with the DP 2.1 specification. DisplayPort 2.0 is long overdue, DP2.1 can’t wait
In terms of product support, AMD will release the RX 7000 series of graphics cards next month, which is expected to bring DP 2.1 for the first time. Currently, Intel Arc A series graphics cards and AMD Ryzen 7000 series integrated GPUs already support DP 2.0, and NVIDIA RTX 40 series continue to support DP 1.4.
