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USB-IF Announces Publication of New USB4 Specification to Enable USB 80 Gbps Performance

TheLostSwede

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USB Implementers Forum (USB-IF), the support organization for the advancement and adoption of USB technology, today announced the publication of the USB4 Version 2.0 specification, a major update to enable USB 80 Gbps performance over the USB Type-C cable and connector. The updated USB4 specification doubles the maximum aggregate bandwidth of USB to the benefit of higher-performance displays, storage, and USB-based hubs and docks. The USB Type-C and USB Power Delivery (USB PD) specifications have also been updated to support this higher level of data performance.

"For engineers, USB4 is defined by its multi-protocol tunneling that architecturally differentiates it from its predecessors - USB 3.2 and USB 2.0," said Brad Saunders, USB-IF Board Chair and CEO. "This updated technical specification extends USB4 speed and data protocol performance, enabling manufacturers to develop products that can deliver USB 80 Gbps in addition to existing USB 40 Gbps and USB 20 Gbps to end users."




Key characteristics of the updated USB 80 Gbps solution include:
  • Up to 80 Gbps operation, utilizing a new physical layer architecture based on PAM3 signal encoding, over existing 40 Gbps USB Type-C passive cables and newly defined 80 Gbps USB Type-C active cables.
  • Optionally for certain applications, such as driving very-high performance USB4-based displays, the USB Type-C signal interface can be configured asymmetrically to deliver up to 120 Gbps in one direction while retaining 40 Gbps in the other direction.
  • Updates to data and display protocols to better use the increase in available bandwidth
  • USB data architecture updates now enable Enhanced SuperSpeed USB data tunneling to exceed 20 Gbps.
  • Aligns with DisplayPort Revision 2.1 and PCI Express Revision 4.
  • Backward compatibility with all previous versions of USB.

Guidelines for identifying certified USB 80 Gbps solutions and cables will follow the new unified USB-IF branding and marketing program. As a reminder, USB specification names and technical terminology are not intended for use when describing USB capabilities to end consumers. USB-IF certified logo and branding details are available at www.usb.org/logo-license.

USB Developer Days 2022 will include detailed technical training covering the latest updates to the USB4, USB Type-C and USB PD specifications.

View at TechPowerUp Main Site | Source
 
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You guys keep making memes out of it, but doesn't this pretty much fix everything wrong with it?
 
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You guys keep making memes out of it, but doesn't this pretty much fix everything wrong with it?
USB 4 SE
USB 4
USB 4 Pro
 
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You guys keep making memes out of it, but doesn't this pretty much fix everything wrong with it?
In theory, yes. Going forward Type C is only connector available, and most consumers will only see one of the following (besides the 80 gbps version just announced):
1666116605510.png


Or one of these, for Power Delivery stuff:
1666116806090.png
 
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I'm looking forward to have this in my work laptop in 10 years time to connect to the docking station at full speed.
 
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Higher number is better, every corporate marketing drone knows that. Why not have all the numbers then? Give the consumer an encyclopedia sized book explaining which port on their laptop does what and which specific cable they need to do anything. And while they're on it, add a ¬ symbol in front of the "U" in the name. ¬U SB is what it really is at this point.
 
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I literally do. not. care. anymore.
 
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Wonder when they'll change the entire naming scheme over to "USBexpress"? Seems that's basically what it has become.

USBe Gen1 x(#of lanes)
USBe Gen2 x(#of lanes)
USBe Gen3 x(#of lanes)
USBe Gen4 x(#of lanes)

They've already drawn ire aggro; might as well roll with it.
 
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TheLostSwede

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... but they literally just announced the 80 gbps version and now they're announcing 120 gbps?

:eek:
Did you not read the press release?
The 120 Gbps options is actually 120/40 Gbps, so 120 Gbps to a display, with DP tunneling and 40 Gbps to the PC from the display (acting as a hub).
It's all part of the 80 Gbps spec. They just take an extra pair of lanes for upstreams data and use a single pair for downstreams data. The other way around is admittedly also possible, but less likely.
 
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Wonder when they'll change the entire naming scheme over to "USBexpress"? Seems that's basically what it has become.
Actually they have already done this. And from my perspective, it is most outrageous they abandoned this scheme in USB4 after so much pain USB3 has went through.

1666207469747.png


Contrary to popular belief, Gen[Y]x[Z] is a great naming scheme. A shame they decided to bend to pressure from the public.
 
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Actually they have already done this. And from my perspective, it is most outrageous they abandoned this scheme in USB4 after so much pain USB3 has went through.

View attachment 266198

Contrary to popular belief, Gen[Y]x[Z] is a great naming scheme. A shame they decided to bend to pressure from the public.
... I swear I'm not sure if you're being sarcastic to the point of breaking my sarcasm detector or if you're being serious.
Did you not read the press release?
I had a brain-fart moment :oops:
 
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... I swear I'm not sure if you're being sarcastic to the point of breaking my sarcasm detector or if you're being serious.
The evolution of bleeding-edge high speed serial port has its own logic. No matter how you try to hide it with marketing names, the underlying pattern will always show up as a PCIe-like nomenclature. Otherwise, try explain why USB4 120Gbps is the same thing as USB4 80Gbps.

If the versioning of something is so harmonious to human mind, then it is either too outdated to have uncertainty, or as restrictive as a private product from a company.
 
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The 4 instead of a lowercase e, makes the brain pick it up as gobblygook.
It'd be like when AGP left us we called PCIe:

PCI2 gen1 1x16
PCI3 gen1 2x16
PCI2 gen1 1x8
PCI3 gen1 2x8
PCI2 gen1 1x4
PCI3 gen1 2x2
PCI2 gen1 1x1
 
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