It’s hard to believe, but the USB standard is becoming more and more confusing and the announcement of the USB 3.2 standard does not arrange anything, while USB4 is already looming.
While USB 3.2 sows confusion, the USB4 promises to simplify the naming grid of the universal serial bus.
Few people know the difference between USB 2.0, USB 3.0, USB 3.1 Gen 1 / Gen 2, and so on. With the announcement of USB 3.2, everything changes again. On the bright side, the USB-IF clearly that the latest USB 3.2 specification offers an impressive 20 Gb / s. But this is the only thing simple, because the USB 3.2 now incorporates all the previous specifications, and the new is decked out the awful name USB 3.2 Gen 2×2. While awaiting the next evolutions, one can try to summarize thus the specifications of USB 3.2.
- The USB 3.2 Gen 1 (formerly USB 3.0, or formally USB 3.1 Gen 1) offers a transfer rate of 5Gb / s and its official commercial name is SuperSpeed USB.
- The USB 3.2 Gen 2 (formerly USB 3.1, or formally USB 3.1 Gen 2) offers a transfer rate of 10 Gb / s and its official name is now SuperSpeed USB 10 Gb / s.
- The USB 3.2 Gen 2×2 (the latest specification) offers a transfer rate of 20 Gb / s and its official commercial name is now SuperSpeed USB 20 Gb / s.
Note in passing that these new specifications refer only to the speed of flow, not to the cable or physical USB port. The transition of physical USB-A and USB-C connectors is in progress, but it is a separate issue.
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Manufacturers must clearly indicate the transfer speed
The document describing the new specifications repeatedly reiterates the importance for manufacturers to clearly indicate the speed of the USB device or USB port. “In the case of a product based and compliant with the USB 3.2 specification, it is essential that manufacturers clearly identify the performance of this device apart from the other benefits and / or physical characteristics of the product,” the document says. But as some have quickly pointed out, for example, there is nothing to prevent a laptop manufacturer from simply designating a device as a “USB 3.2” port without indicating the level of bandwidth to the user.
Notwithstanding the arguments for the USB-IF, the only restrictions seem to concern the use of the logos of the USB-IF, which requires compliance validation by the USB Compliance Program. Nevertheless, there is even a reason to rejoice: the new specifications are backward compatible, which means that you can still connect an old USB device to a new USB 3.2 port. Even if it does not change the nightmare of repeated denomination changes. An additional puzzle that buyers of computers and smartphones would have done well …
Source: Manage IT Solutions