USB 3.1 Gen1 vs Gen2: Key Differences Explained

This page compares USB 3.1 Gen1 vs USB 3.1 Gen2 and highlights the key differences between them.

Introduction to USB

The acronym USB stands for Universal Serial Bus. It’s an interface similar to RS232 and RS485 but designed to support higher data transfer rates over varying distances.

USB facilitates peer-to-peer communication. In this type of interface, communication occurs between a host and a peripheral device, not directly between two hosts or two peripherals.

The USB standard provides detailed specifications for cables, connectors, and communication protocols. It outlines the requirements for connection, communication, and power supply (PS) between PCs and peripheral devices. There are several USB versions, including v1.x, v2.x, and v3.x, each supporting different data rates. Both USB 3.1 Gen1 and Gen2 build upon the USB 3.0 standard.

Key Messages of USB 3.1:

• Provides requirements for various applications like storage, displays, and docking stations.
• Enables convenient and quick content transfer across various devices.
• Backward compatible with existing 5Gbps hubs/devices and USB 2.0 based products.
• Ensures interoperability between devices from different vendors.

USB 3.1 Gen1

• Also known as SuperSpeed USB.
• Transfer rate: 5 Gbps
• The terms USB 3.1 Gen 1 and USB 3.0 are essentially synonymous.

USB 3.1 Gen2

• Also known as SuperSpeed+ USB or SuperSpeed USB 10Gbps.
• Transfer rate: 10 Gbps

Tabular Difference between USB 3.1 Gen1 and USB 3.1 Gen2

The following table summarizes the key differences between USB 3.1 Gen1 and USB 3.1 Gen2.