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. The group ended up creating a new USB specification, USB 3.1, which was released on 31 July 2013, 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, 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. The first USB 3.1 implementation demonstrated real-world transfer speeds of 7.2 Gbit/s.
USB 3.1 gen 1
USB 3.1 gen 1 has the same signalling rate as USB 3.0.
USB 3.1 gen 2
Relation to other specifications
The USB 3.1 standard is backward compatible with USB 3.0 and USB 2.0.
- USB 3.0 - referred to as USB 3.1 gen 1
- USB Type-C - connectors allow for transmissions of USB 3.1
- Thunderbolt 3 - uses USB Type-C connectors which allow for transmissions of USB 3.1
- "SuperSpeed USB (USB 3.0) Performance to Double with New Capabilities" (PDF) (Press release). Implementers Forum. 2013-01-06.
- "SuperSpeed USB 10 Gbps – Ready for Development" (PDF) (Press release). Hillsboro, Ore. July 31, 2013. Archived from the original (PDF) on 2016-01-27.
- "SuperSpeed USB 10 Gbps - Ready for Development". Rock Hill Herald. Archived from the original on 11 October 2014. Retrieved 2013-07-31.
- "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.