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USB 4.0 "USB4" Specification Published

Written by Michael Larabel in Standards on 3 September 2019 at 01:04 PM EDT. 54 Comments

As expected after Intel provided Thunderbolt 3 to the USB Promoter Group royalty-free earlier this year, the USB 4.0 "USB4" specification was published today and indeed based on the Thunderbolt protocol specification.

USB 4.0 doubles the maximum aggregate bandwidth and allows for multiple simultaneous data and display protocols. USB4 allows for two-lane operation on existing Type-C cables and up to 40 Gbps operation on certified 40 Gbps cables. USB4 is backwards compatible with USB 3.2, USB 2.0, and Thunderbolt 3.

More details via today's announcement with USB-IF publishing the USB4 specification.

54 Comments

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.