USB 太多太乱？看这一篇就够了

Core Viewpoint - The article discusses the evolution and various standards of USB technology, highlighting the importance of understanding different USB protocols and their corresponding performance indicators. Group 1: USB Evolution - USB was introduced in the late 1990s as a universal interface, replacing multiple types of ports and significantly changing computer usage [1] - USB 2.0, released in April 2000, offered a transmission speed of 480 Mbps, a substantial increase from USB 1.1's 12 Mbps, making it suitable for high-bandwidth peripherals [5][6] - USB 3.0, launched in November 2008, increased the maximum speed to 5 Gbps (625 MB/s), marking a significant upgrade over USB 2.0 [9] - USB 3.1 Gen 2 doubled the speed to 10 Gbps (1250 MB/s) in 2013, with further updates leading to USB 3.2 Gen 2x2 supporting 20 Gbps [13][16] - USB4, introduced in 2019, provided a major upgrade with a theoretical maximum bandwidth of 40 Gbps (5000 MB/s) [19] - USB4 Version 2.0, launched in 2022, further increased the speed to 80 Gbps (10000 MB/s) [21] Group 2: USB Standards and Icons - USB Implementers Forum (USB-IF) created a set of icons to help users identify the supported protocols and performance of USB ports [2] - The USB PD (Power Delivery) standard allows for power delivery of up to 100W, with the latest version supporting up to 240W [29] - DisplayPort Alternate Mode allows USB-C ports to support video output, but is gradually being replaced by USB4 and Thunderbolt standards [33][34] Group 3: Thunderbolt Technology - Thunderbolt is not USB but uses USB-C connectors and has cross-compatibility with USB, making it relevant for users to understand [24] - The latest Thunderbolt version supports speeds up to 80 Gbps, comparable to USB4 [25]