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PCI Express (PCIe)
PCIe Slots
November 27, 2006
The primary interconnect used in computers today is PCI Express (PCIe).
For years computers primarily relied on parallel bus technology. PCIe came along in 2004. PCIe marked a switch from parallel bus technology to a serial bus. "Its introduction signaled the transition of computing platform I/O from the parallel bus model that had existed since the PC industry’s inception to a high-speed, serial I/O standard".
Extensions to PCIe are currently being investigated, proposed, and supported by divers companies.