There are four different versions and a wide variety of power choices that each “USB C” cable is permitted to make. So the answer to your question is “it depend

There are four different versions and a wide variety of power choices that each “USB C” cable is permitted to make. So the answer to your question is “it depends”, since 100W support is optional in USB-C cables. (Note: If you change “USB C” cable to “Thunderbolt 3” cable, those choices are all zeroed out. So the answer to that modified question is “yes”, since 100W support is mandatory in Thunderbolt 3 cables.) This will get better over the next year for certified cables that print USB-compliant logos on them, with the end of SuperSpeed branding: https://news.ycombinator.com/item?id=33034530 https://news.ycombinator.com/item?id=33034530 > Branding for certified USB Type-C cables is also being updated. Rather than simply listing their data transfer speeds, cables will also (for the most part) have to list the charging wattage they’re capable of carrying. So a cable can’t just be branded as being a 40Gbps cable as with last year’s guidelines, it’ll now also have to list a charging speed like 60W or 240W. But I’ve never seen the USB logos printed on a cable before, so it remains to be seen whether the reduction in complexity to Gbps/W only is sufficient to persuade cable makers to certify their cables or not.