If you search for "PCI Express M.2 Specification Revision 5.0 Version 1.0 PDF" on the public web, you will find press releases, forum discussions, and vendor white papers—but . Here is why:
If you download the PDF, check : it lists allowable power envelopes for different M.2 lengths (2280 vs 22110) at Gen5 speeds—an essential reference for heatsink designers. pci express m.2 specification revision 5.0 version 1.0 pdf
The jump from PCIe 4.0 to 5.0 doubles theoretical bandwidth. For an M.2 SSD using four lanes (x4), this means: If you search for "PCI Express M