But cables are turning out to be the Achilles' heel of the USB-C connector.

The USB Promoter Group hasannounced USB4 version 2.0, which they claim will deliver speeds up to 80 Gbps.

Thats twice the 40 Gbps promised by theoriginal USB4and even Thunderbolt 4.

Closeup on a hand holding a USB-C cable with no markings.

Mac Care / Unsplash

Unfortunately, there’s no universality when it comes to USB-C.

While every USB-C port looks the same, they don’t all offer the same capabilities.

USB-C’s confusing cabling ecosystem further complicates the situation.

Top down view of USB-C, USB micro, and Lightning cables for mobile devices.

Michael Derrer Fuchs / Getty Images

The key is the form factor, not the spec.

That’s not counting active cables, which look the same as passive cables but have different limitations.

“The key is the form factor, not the spec,” asserted Knight.