1. Added an important data transfer rate. 3.0 is SuperSpeed 5.0Gbps, 2.0 is 1.5Mbps, 12Mbps or 480Mbps.

2. Transfer packets in a point-to-point manner to minimize the number of active links.

3. Asynchronous notification function, eliminating the need for polling.

4. Link-based power management, which is the basic design of the bus structure.

5. Backward compatible with USB2.0, compatibility is achieved at both the driver and physical level. Data interface, 3.0 is full-duplex, four-way differential signal independent of USB 2.0 signal, supports simultaneous bidirectional data transmission, 2.0 is half-duplex, dual differential signal, one-way data transmission, need to negotiate the transmission direction of the general route in advance.