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PCI Express (Peripheral Component Interconnect Express – AKA: officially abbreviated as PCIe or PCI-e) , a high-speed serial computer expansion bus standard, designed to replace the older PCI, PCI-X and AGP bus standards. PCIe has numerous improvements over the older standards, including higher maximum system bus throughput, lower I/O pin count and smaller physical footprint, better performance scaling for bus devices, a more detailed error detection and reporting mechanism, and native hot-swap functionality and provide hardware support for I/O virtualization.

PCI Express