USB

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  • USB 1.0

    Released in January 1996, USB 1.0 specified data rates of 1.5 Mbit/s (Low-Bandwidth) and 12 Mbit/s (Full-Bandwidth). It did not allow for extension cables or pass-through monitors, due to timing and power limitations. Few USB devices made it to the market until USB 1.1 was released in August 1998, fixing problems identified in 1.0, mostly related to using hubs. USB 1.1 was the earliest revision that was widely adopted.

  • USB 1.1

    USB 1.1 was released in August 1998. Fixing problems in 1.0 mostly related to using hubs.

  • USB 2.0

    USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), in addition to the "USB 1.x Full Speed" signaling rate of 12 Mbit/s. USB 2.0 connectors are usually colored black.

  • USB 3.0

    USB 3.0 was released in November 2008. The standard defines a new SuperSpeed mode with a signaling speed of 5 Gbit/s and a usable data rate of up to 4 Gbit/s (500 MB/s). A USB 3.0 port is usually colored blue, and is backwards compatible with USB 2.0.

  • USB 3.1

    A January 2013 press release from the USB group revealed plans to update USB 3.0 to 10 Gbit/s, effectively putting it on par with Thunderbolt by mid-2013. The USB 3.1 specification was released on 31 July 2013,introducing a faster transfer mode called "SuperSpeed USB 10 Gbps"; its logo features a SUPERSPEED+ caption.