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A comment on USB4 Specification Announced: Adopting Thunderbolt 3 Protocol for 40 Gbps USB. Parent comment

Re:USB4 Specification Announced: Adopting Thunderbolt 3 Prot... by gumby on Monday March 04, 2019 @04:17PM (#19305621)
Thunderbolt is PCIe.
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Re:USB4 Specification Announced: Adopting Thunderbolt 3 Prot... by rjeli on Monday March 04, 2019 @08:00PM (#19307229)
Not quite: https://twitter.com/whitequark/status/1097777102563074048

"Thunderbolt, uh, does not expose PCIe lanes directly. Thunderbolt is an MPLS-like packet switching network that can encapsulate PCIe TLPs over a PHY and MAC without a spec, chips without documentation, and software with barely any support."

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Re:USB4 Specification Announced: Adopting Thunderbolt 3 Prot... by vardump on Monday March 04, 2019 @04:44PM (#19305887)
Thunderbolt encapsulates PCIe frames. It's not PCIe any more than say ethernet is UDP.
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