USB 3.1

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USB 3.1 is a specification published by the USB-IF.

A January 2013 press release from the USB group revealed plans to update USB 3.0 to 10 Gbit/s.[1] The group ended up creating a new USB specification, USB 3.1, which was released on 31 July 2013,[2] replacing USB 3.0 standard. USB 3.1 specification takes over existing USB 3.0's SuperSpeed USB transfer rate, also referred to as USB 3.1 Gen 1, and introduces a faster transfer rate called SuperSpeed USB 10 Gbps, also referred to as USB 3.1 Gen 2,[3] putting it on par with a single first-generation Thunderbolt channel. The new mode's logo features a caption stylized as SUPERSPEED+. The USB 3.1 standard increases the maximum data signaling rate to 10 Gbit/s, double that of SuperSpeed USB, and reduces line encoding overhead to just 3% by changing the encoding scheme to 128b/132b.[4] The first USB 3.1 implementation demonstrated real-world transfer speeds of 7.2 Gbit/s.[5]

USB 3.1 gen 1[edit]

USB 3.1 gen 1 has the same signalling rate as USB 3.0.

USB 3.1 gen 2[edit]

The maximum data signaling rate of USB 3.1 gen 2 is 10 Gbit/s - double that of USB 3.0.

Relation to other specifications[edit]

The USB 3.1 standard is backward compatible with USB 3.0 and USB 2.0.


  1. ^ "SuperSpeed USB (USB 3.0) Performance to Double with New Capabilities" (PDF) (Press release). Implementers Forum. 2013-01-06. 
  2. ^ "SuperSpeed USB 10 Gbps – Ready for Development" (PDF) (Press release). Hillsboro, Ore. July 31, 2013. Archived from the original (PDF) on 2016-01-27. 
  3. ^
  4. ^ "SuperSpeed USB 10 Gbps - Ready for Development". Rock Hill Herald. Archived from the original on 11 October 2014. Retrieved 2013-07-31. 
  5. ^ "Synopsys Demonstrates Industry's First SuperSpeed USB 10 Gbps Platform-to-Platform Host-Device IP Data Transfer" (Press release). Mountain View, California: Synopsys. 2013-12-10. Retrieved 2013-12-23. As measured by the Ellisys USB Explorer Protocol Analyzer, the IP realized 10 Gbps USB 3.1 effective data rates of more than 900 MBps between two Synopsys HAPS-70 FPGA-based prototyping systems while using backward compatible USB connectors, cables and software.