Peripheral Component Interconnect Express or  shortened to PCI-E is a newest standard for expansion card interface. Introduced and designed by Intel in 2004. to replace the older PCI and AGP standards.

PCI-SIG (lectronics industry consortium with representatives from: Intel, Microsoft, IBM, AMD, Sun Micro, HP, Broadcom, Agilent Technologies, and NVIDIA) is responsable for future development, improvemen and standardization of PCI-Express.