Wednesday, June 11th 2025
PCI-SIG Releases PCIe 7.0 Specification to Support 128.0 GT/s Transfer Rates
PCI-SIG today announced the official release of the PCI Express (PCIe) 7.0 specification, reaching 128.0 GT/s, to members. PCIe 7.0 specification targets data-driven applications like AI/ML, 800G Ethernet, cloud, and Quantum computing. Pathfinding for the PCIe 8.0 specification is already in progress to continue supporting the industry's investments and product roadmaps in the PCIe technology ecosystem.
PCIe 7.0 Specification Features
"PCIe technology has served as the high-bandwidth, low-latency IO interconnect of choice for over two decades and we are pleased to announce the release of the PCIe 7.0 specification, which continues our long-standing tradition of doubling the IO bandwidth every three years," said Al Yanes, PCI-SIG President and Chairperson. "As artificial intelligence applications continue to scale rapidly, the next generation of PCIe technology meets the bandwidth demands of data-intensive markets deploying AI, including hyperscale data centers, high performance computing (HPC), automotive and military/aerospace."
"It's a special occasion when a PCIe specification hits the final version," observed Ian Cutress, Chief Analyst and CEO, More Than Moore. "The rise in the demand for both compute and networking, enabled through PCIe technology, is at an all-time high, despite the complexities of creating standards in the industry around high-speed signaling. Datacenters are ready to start deploying networks built on PCIe 7.0 technology, and almost every ASIC company I talk to is already engaged with the IP providers and are set to take advantage. Even with the popularity and focus that went into PCIe 6.0 deployment, the PCIe 7.0 specification has more enthusiasm than any previous version."
Source:
PCI-SIG
PCIe 7.0 Specification Features
- Delivers 128.0 GT/s raw bit rate and up to 512 GB/s bi-directionally via x16 configuration
- Utilizes PAM4 (Pulse Amplitude Modulation with 4 levels) signaling and Flit-based encoding
- Provides improved power efficiency
- Maintains backwards compatibility with previous generations of PCIe technology
"It's a special occasion when a PCIe specification hits the final version," observed Ian Cutress, Chief Analyst and CEO, More Than Moore. "The rise in the demand for both compute and networking, enabled through PCIe technology, is at an all-time high, despite the complexities of creating standards in the industry around high-speed signaling. Datacenters are ready to start deploying networks built on PCIe 7.0 technology, and almost every ASIC company I talk to is already engaged with the IP providers and are set to take advantage. Even with the popularity and focus that went into PCIe 6.0 deployment, the PCIe 7.0 specification has more enthusiasm than any previous version."
43 Comments on PCI-SIG Releases PCIe 7.0 Specification to Support 128.0 GT/s Transfer Rates
Issue with PCIe 6.0 is that the PCIe-SIG has delayed their conformity program a lot, so there's no way for manufacturers to have 6.0 devices out there. As an example, Nvidia's DC Blackwell offerings already do support PCIe 6.0 since last year, but there's no way to make proper use of it without the remaining of the platform passing the conformity tests.
Let's hope that PCIe 7.0 does not face such bottlenecks.
For mainstream consumers this is pretty moot and 4.0 is enough for the majority of people. Heck, even 3.0 is good enough for almost all folks that just want to play games and don't do much else with their PCs.
Previous gen PCIE stuff was designed with comparably ancient tools with less specialists and tools involved. Though, the main principle and idea haven't changed much, it still was much slower and lenghtier process overall.
And it is getting harder to achieve these new specifications without tradeoffs like high power consumption or cost. PCIe v1 signals are able to stretch across an entire motherboard passively using cheap copper traces. But every subsequent generation has reduced the maximum trace length. Now to get the same distance with PCIe v6/v7, you need multiple expensive, power-hungry retransmitters or an exotic solutions like optical fiber--both of which are expensive. Just look at modern consumer platforms. They have a mix of PCIe v5, v4, and v3 to save cost rather than 100% PCIe v5. Back when PCIe v2/v3 was the newest tech, the entire platform was updated to use the newest spec.
A. a 'standard' for M.2 coolers or
B. E.1S (and its coolers) coming to desktop.
As-is, we've already seen benefit from liquid cooling Gen5 SSDs... kinda nuts.
And the consumer grade HW, should be left with lowed PCIE gens like 4.0-5.0/5.1 (due to unnecessary cost rise), up until the fiber becomes accessible and ironed out by enterprise market.