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SESK: Stuff Everyone Should Know · sesk.info/aplus-thunderbolt4-40

What minimum bandwidth does Intel list for Thunderbolt 4?

40 Gbps, which Thunderbolt 5 doubles to 80 Gbps.

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  1. 20 Gbps
  2. 80 Gbps
  3. 40 Gbps ✔

Why: Intel lists 40 Gbps as the minimum required bandwidth for Thunderbolt 4. Thunderbolt 5 doubles that minimum to 80 Gbps. Thunderbolt 4 uses the USB Type-C connector.

Huh, didn't know that: Intel says Thunderbolt 4 uses a single universal port, USB Type-C.

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References

Answer: 40 Gbps. Intel lists 40 Gbps as the minimum required bandwidth for Thunderbolt 4. Thunderbolt 5 doubles that minimum to 80 Gbps. Thunderbolt 4 uses the USB Type-C connector.

  1. Thunderbolt technology overview, Intel www.intel.com/content/www/us/en/architecture-and-technology/thunderbolt/overview.html
    Thunderbolt™ 5 technology doubles minimum bandwidth requirements from 40 Gbps to 80 Gbps compared to Thunderbolt™ 4 technology.
    Checked 2026-10-11.

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