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@990000 @thomasfuchs These are some of the possible combinations for cables that have USB-C connectors on both sides:

• USB 2.0 only
• USB 3.0/3.1/3.2
• Thunderbolt3
• Thunderbolt4/USB4
• Thunderbolt5

And these can each support either 3 A or 5 A power and either up to 20 or up to 48 V. TB3/4/5 cables are usually marked by having number 3/4/5 next to the connector, but the others typically have no markings. Good luck figuring out what the cable supports!