● Covered by 1 source · 1 reportMedium impact1 neutral
PCIe 6.0 SSDs and controllers are nearing commercial availability after delays
Key points
- PCIe 6.0 specification ratified in early 2022.
- Micron and Samsung have introduced PCIe 6.0 SSDs.
- Marvell, Phison, and SMI are developing PCIe 6.0 controllers.
- PAM4 signaling in PCIe 6.0 complicated controller development and interoperability.
PCIe 6.0 Implementation Nears
The PCIe 6.0 specification, ratified in early 2022, is now moving towards commercial implementation after years of delays. The first PCIe Gen6 platforms are becoming available, alongside storage devices. Micron released a PCIe 6 SSD in mid-2025, and Samsung followed in July. Independent SSD controller manufacturers, including Marvell, Phison, and Silicon Motion, are also developing their PCIe 6 SSD platforms.
Technical Challenges of PCIe 6.0
PCIe 6.0 adopts PAM4 signaling, which encodes two bits per symbol, effectively doubling the transfer rate to 64 GT/s while maintaining a physical signaling rate of 32 Gbaud. This contrasts with PCIe 1.0 through 5.0, which used NRZ signaling. The change to PAM4 required more complex transmitter and receiver designs, incorporating sophisticated DSPs, equalization, FEC, and CRC-based retry mechanisms, which complicated the development of PCIe 6.0 controllers.
Interoperability and Compliance Delays
The introduction of PAM4 signaling also necessitated new compliance procedures, test equipment, and interoperability programs from PCI-SIG. Interoperability testing among various components like CPUs, GPUs, SSDs, and retimers from multiple vendors is crucial for each new PCIe generation. The development of these new testing programs experienced delays, which further postponed commercial deployment. The first PCIe 6 interoperability testing at 64 GT/s occurred in late July.
Industry Adoption
Despite the implementation hurdles and challenges with interoperability programs, PCIe 6 is beginning to appear in commercial platforms. AMD's 6th Generation EPYC 'Venice' and Nvidia's Vera CPUs are designed to support PCIe Gen6, indicating that adjacent industry sectors are preparing for the new standard.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Reporting from
PCIe 6.0 SSDs and controllers are approaching commercial release, with Micron and Samsung introducing drives, and Marvell, Phison, and Silicon Motion preparing controllers. The transition to PAM4 signaling in PCIe 6.0 doubled transfer rates but introduced significant development challenges for controllers and interoperability testing, causing delays in its implementation.