With USB 4, Thunderbolt and USB will converge | TechCrunch

The USB Implementers Forum (USB-IF) has unveiled the specifications of USB 4.0, as Engadget reports. And USB 4.0 looks a lot like Thunderbolt 3.
Specifications won’t be finalized until later this year, but it seems that one port and one cable type to rule them all.
With Thunderbolt 3, Intel added USB 3.1 Gen 2 support, which means that you can plug a USB device to a Thunderbolt port. And Intel adopted the USB-C port. Even though Thunderbolt is technically superior, it hasn’t been as popular as USB devices.
USB 4.0 will support charging speeds of 100W of power, transfer speeds of 40 Gbps and enough video bandwidth for two 4K displays or one 5K display.


  1. Tomi Engdahl says:

    With USB 4, Thunderbolt 3’s benefits become open to all
    Double the speed of USB 3.2 up to 40 Gbps

    Hot on the heels of USB 3.2 receiving a confusing Gen 2×2 suffix, the USB Implementers Forum (USB-IF) has today announced USB 4, the next version of the ubiquitous connector. Although the draft specification won’t become official until it’s published later this year, the standard is expected to increase its maximum speed to 40 Gbps over the 20 Gbps offered by its current version, USB 3.2.

    If that speed sounds familiar, then that’s because it’s already offered by the Thunderbolt 3 specification

    If you’re familiar with Thunderbolt 3 then you’ll already know a lot of the specs of USB 4. It will still be able to deliver up to 100W of power, and has enough data throughput for the use of external graphics cards, and to power two 4K displays, or a single 5K display. You’ll need to use cables that are capable of 40 Gbps speeds to enjoy the standard’s full benefits, but any existing Thunderbolt 3 cables (and, for that matter, accessories) you have should work with the new port.

    Outside of its specs, the USB-IF is also hoping to use the USB 4 standard as a means of simplifying the USB ecosystem. Rather than each USB device picking and choosing which aspects of the standard it supports, the group wants to produce a list of features each kind of USB 4 device will have to offer

    Although USB 4 will integrate Thunderbolt 3’s features, Intel says that the two standards will coexist. While USB 4 is open, Thunderbolt 3 is not, and Intel requires manufacturers to be certified to use it.

    The publication of the full USB 4 specification is currently due to arrive in the second half of this year,

  2. Tomi Engdahl says:


    USB5 tulee markkinoille joskus 2022-2023 todennäköisesti 80 gigabitin nopeudella. Kunhan muistetaan, että USB5:sta ole vielä tehty mitään pitkälle meneviä suunnitelmia.


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