Yesterday, the USB Promoter Group revealed the next evolution of its ubiquitous peripheral spec: USB4. The new specification, which is still a draft in the final stages of review, is based on Intel's Thunderbolt 3 protocol, delivering up to 40Gbps throughput over existing, Thunderbolt spec-certified Type-C cables. That's twice as fast as current USB 3.2 maximums. It's also backward compatible with existing USB 3.2, 2.0, and Thunderbolt 3 specs and devices.

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