Stuart Breckenridge

External monologue.

The USB 3.x Renaming Mess

Juli Clover, for Macrumors:

Going forward, USB 3.1 Gen 1 (transfer speeds up to 5Gb/s), which used to be USB 3.0 prior to a separate rebranding, will be called USB 3.2 Gen 1, while USB 3.1 Gen 2 (transfer speeds up to 10Gb/s) will now be known as USB 3.2 Gen 2.

What used to be considered USB 3.2 will now be USB 3.2 Gen 2x2 because if offers twice the throughput speeds of USB 3.1 Gen 2, now USB 3.2 Gen 2. If that sounds confusing to you, you’re not alone. Tom’s Hardware made this handy chart that shows the new branding scheme compared to the older branding.

If the swap between USB 3.1 Gen 1 and Gen 2 to USB 3.2 wasn’t confusing enough, each of these specifications also has a marketing term. The new USB 3.2 Gen 1 with transfer speeds up to 5Gb/s is SuperSpeed USB, while USB 3.2 Gen 2 with transfer speeds up to 10Gb/s is known as SuperSpeed USB 10Gbps. The USB 3.2 Gen 2x2 specification with transfer speeds up to 20Gb/s is known as SuperSpeed USB 20Gbps.

This is just crazy:

  • USB 3.1 Gen 1 (now USB 3.0 & SuperSpeed USB)
  • USB 3.1 Gen 2 (now USB 3.1 & SuperSpeed USB 10Gbps)
  • USB 3.2 (still USB 3.2 & SuperSpeed USB 20Gbps)

The USB-C connector on my MacBook Pro supports 40Gbps through Thunderbolt 3 and 10Gbps through USB 3.11. I had to dig through the tech specs to work that out. It’s absolutely user hostile.

  1. USB 3.1 Gen 2 ↩︎