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Definition: USB 3.0


The third-generation USB interface introduced in 2008. Called "SuperSpeed USB" (SS USB), USB 3.0 increased speed from 480 Mbps to 5 Gbps and reduced CPU overhead by no longer continuously polling devices. In practice, USB 3.0 devices do not achieve a 10x speed increase. For example, a USB 3.0 storage drive may deliver a 50% improvement over its USB 2.0 counterpart. See USB.

USB 3.0 Is Now Part of USB 3.2
For a while, USB 3.0 became USB 3.1 Gen 1 but was later incorporated into the USB 3.2 specification as USB 3.2 Gen 1x1. See USB 3.2.




Bigger USB 3.0 Type B Connectors
A Type A 3.0 cable can plug into a Type A 2.0 socket, but not the other end of the cable. Type B 3.0 and Micro-B 3.0 plugs are larger than their 2.0 counterparts. (Images courtesy of Intel Corporation.)






The Blue Ports
USB 3.0 ports generally have a blue tongue in contrast to black or white, which is USB 2.0. The SuperSpeed (SS) logos are the primary identifier.






The In-Between Naming
USB 3.0 was USB 3.1 Gen 1 for a while until it was renamed USB 3.2 Gen 1x1. (Image courtesy of Tripp Lite, www.tripplite.com)