What is the difference between USB 3.2 and 3.1 and how fast is it?

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I believe that everyone is not unfamiliar with the USB interface, the speed of the transfer rate will absolutely affect everyone’s user experience. Today’s “USB 3.0 Promoter Group” formed by Intel, Microsoft, Apple and other companies formally launched the USC 3.2 standard, claiming that USB 3.1 can be replaced with a faster transfer rate. It seems that everyone will transfer files and exchange HD videos quickly. It will be more convenient.

USB3.2 and USB3.1

Difference between USB3.2 and USB3.1: Speed Doubled and Dual Channel Operation

USB 3.2 continues to demonstrate its strong compatibility features – USB 3.2 is compatible with USB 3.1 and below standard host and storage devices, while speed is easily doubled. From the information published by the USB 3.0 Promoter Group, USB 3.2 still uses SuperSpeed USB layer data rate and encoding technology, which is not different from USB 3.1; however, the USB 3.2 standard updates the hub specification to support host devices and peripherals. Switch seamlessly between single and dual channels.

Difference between USB 3.2 and 3.1

USB 3.2 supports multi-channel operation, using a USB 3.2 host to connect USB 3.2 storage devices, up to 2GB/s data transfer rate. However, as far as the current situation is concerned, this limit speed is currently only supported when using a USB-C cable (via USB SuperSpeed 10Gbps USB 3.1 certification). It seems that USB 3.2 is more like merging two independent USB 3.1 channels, thereby doubling the one-way transfer rate. The principle is similar to the evolution of Thunderbolt 1 to Thunderbolt 2; as for the bandwidth and data transfer efficiency. Improvements are not mentioned for the time being.

laptop USB TYpe-C 3.1

As everyone’s pursuit of data transfer speed has not only improved, the USB version has evolved from 1.0 (1.5Mbps), 1.1 (12Mbps), 2.0 (480Mbps), 3.0 (5Gbps), 3.1 (10Gbps) to 3.2 (theoretical up to 20Gbps) , almost every upgrade will give the user a “feel like flying.” However, the current speed of USB 3.1 is still worrying. Manufacturers have even begun to confuse and mislead consumers with “ub3.1 gen1 gen2” and other incomprehensible words. So the promotion of new interface standards still has a long way to go… …


H2S Media Team
H2S is a group of tech enthusiasts those are passionate about latest technology developments. They always like to solve own technical problems and share the same solution with others through this Website.


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