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USB4 spec finalized, brings Thunderbolt 3 compatibility and speeds up to 40 Gbps

The reversible Type-C connector will be used for the new USB4 standard. (Source: Notebookcheck)
The reversible Type-C connector will be used for the new USB4 standard. (Source: Notebookcheck)
The USB Implementers Forum (USB-IF) has finalized the specification for USB4. A few things are different this time around including the way the it named, as well as its support for another standard in the form of Thunderbolt 3.
Sanjiv Sathiah,
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USB Implementers Forum (USB-IF) has finalized the specification for the new USB4 format (and yes, that is how it will be written – not USB 4.0). In addition to the more modernized naming scheme, the new standard will end a lot of the consumer confusion around current USB naming arrangements and performance levels. After all, how many people know off the top of their what the differences are between USB 3.0, 3.1 Gen 1, 3.1 Gen 2 and 3.2 are, particularly the latter three given they all use same Type-C connector. Not only that, but the Type-C connector is also shared between USB 3.1 Gen 1, 3.1 Gen 2 and 3.2 and the not fully compatible Thunderbolt 3 standard.

USB4, thankfully, changes all of this – except for the Type-C connector, which stays. If you’ve been following the development of the latest USB specification you will know that the USB-IF have been targeting Thunderbolt 3-like bidirectional transfer speeds of 40 Gbps. Given that this is exactly the same speed and functionality of Thunderbolt 3 you might also have been wondering how this was going to play out. Happily, USB-IF have come to an understanding with Intel (the owner of the Thunderbolt 3 IP) and USB4 will be fully compatible with Thunderbolt 3 and vice versa.

This is great news for consumers. It means that when USB4 peripherals and devices fitted with the new USB4 standard start rolling out in 2020 you will be able to plug them into existing devices already fitted with Thunderbolt 3 ports, for example. It also means that you can buy a Thunderbolt 3 device and plug it into a new device fitted with USB4 and it will also work as intended. All with the same reversible Type-C connector. It is not often we get to see sanity prevail, particularly when it comes to proprietary technology, but we will have take off our hats to team Blue for making this a reality.

 

 

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Sanjiv Sathiah
Sanjiv Sathiah - Senior Tech Writer - 1254 articles published on Notebookcheck since 2017
I have been writing about consumer technology over the past ten years, previously with the former MacNN and Electronista, and now Notebookcheck since 2017. My first computer was an Apple ][c and this sparked a passion for Apple, but also technology in general. In the past decade, I’ve become increasingly platform agnostic and love to get my hands on and explore as much technology as I can get my hand on. Whether it is Windows, Mac, iOS, Android, Linux, Nintendo, Xbox, or PlayStation, each has plenty to offer and has given me great joy exploring them all. I was drawn to writing about tech because I love learning about the latest devices and also sharing whatever insights my experience can bring to the site and its readership.
contact me via: @t3mporarybl1p
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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2019 09 > USB4 spec finalized, brings Thunderbolt 3 compatibility and speeds up to 40 Gbps
Sanjiv Sathiah, 2019-09- 4 (Update: 2019-09- 4)