USB and its specifications can be a bit confusing, especially after multiple updates. This article will answer questions like “What's the difference between USB 3.2 Gen 1 and Gen 2?” and explore which one is better suited for your system, while also providing other useful information to help you gain a comprehensive understanding of USB standards.
USB 3.0 was released in 2008, nearly 20 years ago, marking the third major revision of the USB standard. Compared to USB 2.0, first introduced in 2000 with a transfer speed of just 480 Mbit/s, USB 3.0 represented a significant leap forward. We no longer use the outdated term “USB 3.0”; it is now referred to as USB 3.2 Gen 1. Therefore, USB 3.0 and USB 3.2 Gen 1 are essentially the same standard.
The USB Implementers Forum (USB-IF), the organization responsible for maintaining USB (Universal Serial Bus) standards, performance specifications, and compliance, made this change to simplify access to consistent information for developers and manufacturers. This ensures products are properly developed and maintain backward compatibility. USB-IF also establishes naming conventions and labeling for USB cables and devices.
USB 3.2 Gen 1 vs. USB 3.2 Gen 2
The sole difference between USB 3.2 Gen 1 and USB 3.2 Gen 2 lies in data transfer speeds. USB 3.2 Gen 1 supports transfer speeds up to 5Gbit/s, while USB 3.2 Gen 2 supports speeds up to 10Gbit/s. The USB-IF organization originally intended to use “SuperSpeed USB” and “SuperSpeed USB+” to differentiate these standards purely for marketing purposes, but the industry did not adopt this naming convention. Typically, OEMs will specify 5Gbps or 10Gbps speeds in their spec sheets to highlight the difference between these two USB standards. Other industry parties simply refer to them as “USB 3.2 Gen 1” or “USB 3.2 Gen 2.”
