It increased the data transfer rate for PC to USB device to 480 Mbps, which is 40 times faster than the USB 1.1 specification. In 2002, a newer specification USB 2.0, also called Hi-Speed USB 2.0, was introduced. Besides different connectors used on USB 3.0 cables, they are also distinguishable from their 2.0 counterparts by either the blue color of the ports or the SS initials on the plugs.Ī successor standard named USB 3.1 was released in July 2013, providing transfer rates up to 10 Gbits/s (1.25 GB/s, called “SuperSpeed+”), which effectively put it on par with the first version of Thunderbolt. Among other improvements, USB 3.0 adds a new transfer mode called “SuperSpeed” (SS), capable of transferring data at up to 5 Gbits/s (625 MB/s), which is more than ten times as fast as the 480 Mbit/s (60 MB/s) high speed of USB 2.0. USB 3.0 is the third major version of the Universal Serial Bus (USB) standard for computer connectivity.
Summary of key USB 2.0 and USB 3.0 technical specifications.
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