PCIe 7.0 Specification, Version 0.3 Available to PCI-SIG Members

[TheLostSwede]

PCI-SIG is pleased to share the PCI Express (PCIe) 7.0 specification, version 0.3 is now available to members. Version 0.3 of the specification indicates that the first review draft of the specification is complete and has received work group approval. This is an important milestone for PCI-SIG, demonstrating we are on plan for a full specification release in 2025.

The PCIe 7.0 specification is targeted to support emerging applications such as 800 G Ethernet, AI/ML, Cloud and Quantum Computing; and data-intensive markets like Hyperscale Data Centers, High-Performance Computing (HPC), Edge and Military/Aerospace.




PCIe 7.0 Specification Feature Goals:

• Delivering 128 GT/s data rate and up to 512 GB/s bi-directionally via x16 configuration
• Utilizing PAM4 signaling
• Defining the channel parameters
• Continuing to deliver the low-latency and high-reliability targets
• Improving power efficiency
• Maintaining backwards compatibility with all previous generations of PCIe technology

Our robust and proven specification development process, spanning three decades, continues to guide us towards success. Thanks to the hard work and dedication of our work groups, PCI-SIG is ahead of the curve in providing the industry with a high-bandwidth, low-latency interconnect for emerging markets.

View at TechPowerUp Main Site | Source

 

[eidairaman1]

Now where can I get a Dual Processor Threadripper Pro Motherboard that has this and Supports DDR5 and has overclocking capability?

 

[Prima.Vera]

So what is the difference between PAM4 and NRZ signaling? And I don't mean from the technical point of view, since this info is available everywhere. Like the actual benefits.
And if the signaling is different, are the PCI-E 6 and 7 downwards compatible with lower versions?
Thank you.

 

[Toothless]

Memebers?

 

[TheLostSwede]

Memebers?

Yes, as in members of the PCI-SIG which is the interest organisation driving the PCIe standards development.
Those that aren't members, don't have access to the specs.

So what is the difference between PAM4 and NRZ signaling? And I don't mean from the technical point of view, since this info is available everywhere. Like the actual benefits.
And if the signaling is different, are the PCI-E 6 and 7 downwards compatible with lower versions?
Thank you.

My assumption here is that PCIe controllers have to support both encoding/signalling schemes for backwards compatibility. It can't be that hard to do and wouldn't be the first standard to use multiple encoding standards, see USB as an example, which supports at least five different encoding standards.

 

[londiste]

So what is the difference between PAM4 and NRZ signaling? And I don't mean from the technical point of view, since this info is available everywhere. Like the actual benefits.
And if the signaling is different, are the PCI-E 6 and 7 downwards compatible with lower versions?
Thank you.

PAM4 is faster?
If everything else remains the same, PAM4 has double the bitrate vs NRZ.

 

[TheDeeGee]

Memebers?

Yep all meme creators can test it.

 

[TheLostSwede]

Memebers?

Sorry, my bad, I didn't realise I made a typo

 

[piloponth]

Where is the optical connection they promised like 5y ago for PCIe6?

 

[TheLostSwede]

Where is the optical connection they promised like 5y ago for PCIe6?

No need, yet?

 

[R0H1T]

Don't expect this in a desktop near you, probably till 2030(?) at least!

 

[wNotyarD]

Now where can I get a Dual Processor Threadripper Pro Motherboard that has this and Supports DDR5 and has overclocking capability?

Is there space for anything else on a motherboard with two Threadrippers?

 

[evernessince]

No need, yet?

True but would be preferred none the less. PCIe 5.0 signals do not go very far and the redrivers are expensive.