Overclock.net - An Overclocking Community - View Single Post - [arstechnica] Thunderbolt 3 becomes USB4, as Intel’s interconnect goes royalty-free

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post #35 of (permalink) Old 03-12-2019, 03:27 PM
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Quote: Originally Posted by TheHorse View Post
Hello, I'm physics of the universe, I'd like to sit down and tell you all about latency.
Most of the latency over USB comes from the protocol overheads.

Thunderbolt is basically just an implementation of PCI-E, which has much lower overheads, and DMA access.

And USB 4.0 seems to just be a rebrand of Thunderbolt 3.

The port just has the ability to switch back to the 'regular' USB protocol, rather than the PCI-E based protocol.

Anyway, Intel were supposed to have released the protocol a few months ago. I wonder why they didn't? To screw with the timing of AMD being able to implement it in Zen v2 chipsets?

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