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SESK: Stuff Everyone Should Know · sesk.info/aplus-usb32-speeds

USB 3.2 identifies three transfer rates. Which set is correct?

5, 10 and 20 Gbps.

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  1. 5, 10 and 20 Gbps ✔
  2. 1, 5 and 10 Gbps
  3. 10, 20 and 40 Gbps

Why: USB-IF says USB 3.2 has three transfer rates: 20, 10 and 5 Gbps. The 20 Gbps rate uses two lanes of 10 Gbps.

Huh, didn't know that: USB 3.2 can use up to two lanes of 10 Gbps to reach a 20 Gbps data transfer rate.

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References

Answer: 5, 10 and 20 Gbps. USB-IF says USB 3.2 has three transfer rates: 20, 10 and 5 Gbps. The 20 Gbps rate uses two lanes of 10 Gbps.

  1. SuperSpeed USB, USB Implementers Forum www.usb.org/superspeed-usb
    USB 3.2 identifies three transfer rates
    Checked 2026-10-10.
  2. SuperSpeed USB, USB Implementers Forum www.usb.org/superspeed-usb
    allowing for up to two lanes of 10Gbps operation to realize a 20Gbps data transfer rate
    Checked 2026-10-10.

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