Topic summary
PCIe 3.0
Extracted from the Wikipedia article PCI Express.
PCI Express OCuLink
OCuLink (standing for "optical-copper link", as Cu is the chemical symbol for copper) is an extension for the "cable version of PCI Express". Version 1.0 of OCuLink, released in Oct 2015, supports up to 4 PCIe 3.0 lanes (3.9 GB/s) over copper cabling; a fiber optic version may appear in the future.