About DP2.0 and USB-C

The USB-C interface itself is part of the official DP2.0 standard. The native DP interface has 4 lanes, but when using the "ordinary" passive USB-C interface (DP Alt Mode), only 2 lanes will be used, resulting in the maximum There is a difference in bandwidth.

USB-C is more of a shape standard for an interface, with an emphasis on shape.

DP is an audio and video data exchange protocol, focusing on data encoding.

There's also a physical interface for Thunderbolt 3 (to become USB 4 in the future), with an emphasis on transport.

The three are not mutually exclusive.

Unlike the previous 1.4 version, DP2.0 uses Thunderbolt 3 as the physical interface (PHY). The original Thunderbolt 3 is a two-way 40Gbps bandwidth, but DP2.0 does not require data uplink, so the two-way is merged into one-way, which becomes a one-way 80Gbps bandwidth. Thunderbolt 3 itself uses a USB-C shape interface, while DP2.0 supports both native DP and USB-C shapes.

However, to achieve the highest bandwidth of Thunderbolt 3, the transmission line is required to be active (or less than 0.5 meters long), and ordinary passive USB cables cannot achieve this rate. In this case, DP2.0 can achieve higher speed and more efficient bandwidth utilization than the original 1.4a version through the new encoding.