PCI Express 2.0 is the newest incarnation of the ”bus”, a device by which the CPU connects to the chipset, and allows all of the PC components to talk to each other. PCI Stands for Peripheral Component Interconnect.
According to the Web site of the PCI Express Special Interest Group, also known as PCI-SIG, one of the most significant features of 2.0 is the doubling of the interconnect bit rate, which substantially kicks up bandwidth. As a result, the CPU can communicate with other components faster than before.
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