On March 21, news came that the PCI SIG organization officially released version 0.9 of the PCIe 7.0 standard draft yesterday, which is also the final draft. The next step is the official release!
According to PCI SIG’s usual process, the 0.9 draft is for final internal review and evaluation by organization members, especially regarding key patents, and does not involve any changes to technical functions.
If all goes well, PCIe 7.0 will be officially released later this year.
The main features of the PCIe 7.0 specification include:
- Bandwidth doubles again, reaching 128GT/s, with x16 bidirectional transfer bandwidth up to 512GB/s, and the most commonly used x4 unidirectional for SSDs can provide 64GB/s
- Continues to use PAM4 signaling, i.e., 4-level pulse amplitude modulation
- Focuses on channel parameters and transmission distance
- Continues to offer low latency and high reliability
- Improves energy efficiency
- Maintains backward compatibility with all previous PCIe technologies
Many people might say that even PCIe 4.0 already feels excessive, so what’s the point of developing so fast?
Indeed, PCIe 6.0/7.0 is of little use for consumer-grade graphics cards or SSDs. Their primary applications remain in professional fields with an insatiable demand for bandwidth, including but not limited to large-scale data centers, high-performance computing, military and aerospace, AI artificial intelligence, ML machine learning, 800G Ethernet, cloud computing, etc.
Storage manufacturers like Kioxia expect PCIe 6.0 SSDs to appear in 2025, begin deployment in 2026, and become widespread around 2028;
PCIe 7.0 SSDs won’t appear until 2028 and will begin deployment in 2029.
In fact, the PCIe 6.0 standard was already released in early 2022 and is only now beginning to be implemented. So the release of PCIe 7.0 at this time is just right.
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