You may never open the 450-page PDF, but its contents affect your daily computing:
The official PCI Express M.2 specification revision 5.0, version 1.0 document is available in PDF format from the PCI-SIG website (pci-sig.com). The document is titled "PCI Express M.2 Specification, Revision 5.0, Version 1.0".
is the specific release that retrofits the M.2 card ecosystem to support PCIe Gen5 signaling speeds —32 GT/s (gigatransfers per second) per lane, versus 16 GT/s for PCIe 4.0.
: Includes support for new voltage rails, such as 0.75V for BGA SSDs and 1.8V I/O for LGA modules.