USB 4 version 2 promises 80 Gbps speeds over existing cables

Re:USB 4 version 2 promises 80 Gbps speeds over existing cables by Nition on Thursday September 01, 2022 @11:31PM (#32686263)

How much more would each cable cost if they all had to do the max feature set? 100W, 80Gps, support for everything.

Is there anything the requires them to not all support the max feature set, apart from cost - some use case that would break, or be dangerous, or be mutually incompatible with another feature?

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Re:USB 4 version 2 promises 80 Gbps speeds over existing cables by klempner on Friday September 02, 2022 @01:37AM (#32686997)

A minimum cable -- USB 2.0 and 3 amps only -- can be considerably thinner. You don't need the extra USB 3 wires and the power wires don't need to be nearly as thick.

It isn't just a question of cost -- if you want a long cable to charge a phone, you'd probably prefer it to be thinner and more flexible, and you don't need the extra power.

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Re:USB 4 version 2 promises 80 Gbps speeds over existing cables by ak217 on Thursday September 01, 2022 @11:39PM (#32686310)

$40 more, representing roughly a 80% increase.

TB4 cables over 1.5ft require inline active signal boosting/filtering chips.

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Re:USB 4 version 2 promises 80 Gbps speeds over existing cables by Nition on Friday September 02, 2022 @12:05AM (#32686471)

Ouch. Maybe we could get it down to two variants, the cheap one and the expensive one? They could even have different-looking plugs...

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