It utilizes the highly efficient 128b/130b encoding scheme introduced in Gen 3. This limits protocol overhead to a mere 1.54%.
Version 1.0 meticulously documents the exact pad dimensions, tolerance stack-ups, and gold-plating thickness required to withstand multiple insertions while preventing fretting corrosion under high-vibration scenarios. Thermal Management Solutions pci express m.2 specification revision 5.0 version 1.0 pdf