USB 4.0 was released on 29, Aug 2019 by the USB Implementers Forum. Similarly 10Gbits/s USB 3.1 Gen 2, got renamed to USB 3.2 Gen 2. For instance USB 3.0 with 5Gbits/s got renamed to USB 3.1 Gen 1 and then renamed again to USB 3.2 Gen 1. Updates: There’s been a lot of confusion on the 3.x spec because of a lot renaming of old standards. Related post: USB 3.2 is out with transfer speeds of up to 20Gbps, twice as fast as its predecessor

The increased speeds were as a result of multi-lane operation or combining two 10 Gbits/s lanes. In July 2017 USB standard group promoter announced USB 3.2 which increased data transfer speeds to 20 Gbit/s over USB type C interface.

USB 3.1 also known as USB 3.1 Gen 2 came in January 2013 doubled the data transfer speeds to 10 Gbits/s. USB 3.0 vs 3.1 vs 3.2īut USB 3.0 since it’s release on November 2008 has made updates. When it comes to cables, USB 2.0 supported maximum cable length is 5 meters while USB 3.0 handles only 3 meters. That meant more devices could be USB-powered instead of being juiced up from the power socket. USB 3.0 also introduced battery Charging 1.2 specification delivering power of up to 7.5 W to 3.0 devices.

Usb 2 vs usb 3 port