Windows Server 2016 Administration Fundamentals

PCI and PCI Express (PCIe)

In the mid-90s, the Peripheral Component Interconnect (PCI) replaced IBM's Industry Standard Architecture (ISA), a 16-bit built-in expansion slot on the motherboard. Unlike the ISA, Intel's PCI is a 32-bit and 64-bit built-in slot on the motherboard that enables the expansion of computer capabilities. Later on, with the increase in demand for faster speeds, the PCI has been replaced by the PCI Express (PCIe). The PCIe is a serial expansion bus standard that comes with four connections, PCIe x1, PCIe x4, PCIEx8, and PCIe x16. It transmits the data in full-duplex mode (sending and receiving at the same time) over wires known as lanes.