The USB Promoter Group has confirmed the USB 3.2 Spec today. The main difference compared to the existing USB 3.1 spec is multi-lane operation on hosts and devices. This means double the bandwidth on existing SuperSpeed Type-C cables. In simpler terms, it’s going to allow for double the speed on SuperSpeed Type-C cables that are already out in the market.
The USB 3.1 spec was designed with single-lane use in mind for both hosts and devices. On the other hand, the SuperSpeed cables were designed with the express aim of multi-lane use. However, they weren’t able to fully take advantage of this because the prevailing spec didn’t allow devices on both ends to support multi-lane use.
This is obviously going to change with the new spec. All upcoming hosts and devices that are certified for the new Usb Spec will have support for multi-lane operation. This will enable existing cables to offer double the speed when connected to those devices.
Exising Gen 1 SuperSpeed USB cables will be able to offer 10Gbps transmission speeds compared to the existing 5Gbps. All existing Gen 2 cables will double their speed to 20Gbps.