USB 3.0 is the latest Universal Serial Bus (USB) standard, released in November 2008. Devices that adhere to the USB 3.0 standard can theoretically transmit data at a maximum rate of 5 Gbps, or 5,120 Mbps. USB 3.0 is often referred to as Super Speed USB. A good indication of USB 3.0 compliance is when the plastic surrounding the plug or receptacle is the color blue. USB 3.0 has dual-bus architecture. This allows the bus to read and write at the same time, significantly speeding up the time it takes to transfer data to and from a peripheral device.
USB 3.1 Gen 1 – Super Speed, 5 Gbit/s (625 MB/s) data signaling rate over 1 lane using 8b/10b encoding, the same as USB 3.0.
USB 3.1 Gen 2 – Super Speed+, new 10 Gbit/s (1250 MB/s) data rate over 1 lane using 128b/132b encoding.
USB 3.0, the third major revision to the Universal Serial Bus standard, has been renamed USB 3.1 Gen 1 by the USB Implementers Forum. However, there are no changes to the technical specifications.
It is capable of data transfer speeds up to 10Gbps, and while it can use the USB-C connector type, it can also use a variety of other connector types. To achieve USB 3.1 transfer speeds, your USB host connection, cables, and device must all support USB 3.1. USB 3.1 is also known as USB 3.1 Gen 2 (10Gbps).
Unless you use an adapter, USB-C ports or cables will not work with USB-A or USB-B ports or cables.
USB 3.1 (aka USB 3.1/gen 2) is the successor to USB 3.0. Identifiable by its bright turquoise port, USB 3.1 doubles the transfer speed of 3.0 to a whopping 10 Gbps. USB Power Delivery 2.0 makes a big step forward as well with up to 100W of power. And like previous versions of USB, it is fully backwards compatible with its predecessors.