The core update in Revision 5.0 is the electrical alignment with PCIe 5.0.
Now that the updated spec is in the wild, here is what you will see in products: The core update in Revision 5
Version 1.0 indicates that this is the first stable, non-draft release of the M.2 specification for PCIe 5.0. Earlier drafts (0.5, 0.7, 0.9) circulated among PCI-SIG members from 2021-2022. The Version 1.0 PDF – often dated November 2023 or Q1 2024 – is the golden master. For now, if you see “rev 5
However, “Version 1.0” does not mean perfect. Expect a Version 1.1 or 2.0 in the future to address: The core update in Revision 5
For now, if you see “rev 5.0 v1.0” on a datasheet, it means the product complies with the final, ratified rules.
The PCI Express M.2 Specification Revision 5.0, Version 1.0 is an industry-standard document. It is typically available in PDF format through the PCI-SIG website.