Why can USB 3 cables only stretch to 3m when Ethernet cables can be 100m?

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USB 3.0/3.1/3.2 Gen 1 aka the kind that can do 5 gbps can only use cables up to 3m in length. Meanwhile Ethernet uses a similar twisted pair copper cable, but can do 10 gbps over 100m.

What gives, why is USB so limited in terms of cable length?

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18 Answers

Anonymous 0 Comments

Ethernet transmit signal (for the most part) compare it to yelling. You can deliver a message by sound up to about 100 meters.

Usb transmit signal and power. That power is a load. Like cardboard boxes. If you want to deliver them safely (not safe, as in dropping the box equals loss of power or fire) you would probably be able to stretch something like 3 meters. Maybe with the right tools, 5 meters.

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