What is the difference between USB-C and Thunderbolt?

Now that Apple has brought a USB-C port to the iPhone 15, it’s time to review how USB-C differs from Thunderbolt.

Similarities:

  • They look alike.
  • They are compatible with each other.

How to identify similar cables:

  • A Thunderbolt connector will have a lightning bolt symbol on it.
  • No lightning bolt? Then it’s a USB-C connector.

Keep in mind:

  • Use Thunderbolt cables between Thunderbolt devices to get the fastest transfer speeds.
  • Thunderbolt 4 runs at 40Gbps, up to four times faster than USB-C.
  • USB-C cables marked SS (for Super Speed) are faster than USB 2.0 cables.

(See Cult of Mac for more.)

My take: turns out, a cable is not just a cable! I wonder if there’s a plug in device to tell you if your cable is legit and what speeds it supports. But whatever you do, don’t check out this video if you’re paranoid.

1 thought on “What is the difference between USB-C and Thunderbolt?

  1. Never heard of a Thunderbolt. I’ve seen the ‘lightning’ symbol, however I didn’t know what it was for. Thank you for the info, Michael.

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