What is the meaning of PCIe?

What is PCIe?

PCIe (Peripheral Component Interconnect Express) is a high-speed serial computer expansion bus standard used to connect devices such as graphics cards, network adapters, and storage devices to a computer's motherboard.

It provides faster data transfer rates than older expansion bus standards, such as PCI and AGP. PCIe uses a point-to-point connection between the device and the CPU, allowing multiple devices to be connected to the same bus without interfering with each other's performance. It supports multiple data lanes, which allow for increased bandwidth and improved performance. The latest version of PCIe, PCIe 4.0, provides data transfer rates of up to 16 GT/s (gigatransfers per second) per lane, with a maximum of 64 GT/s for a 16-lane configuration. PCIe 5.0, released in 2019, further doubles the transfer rate to 32 GT/s per lane. Overall, PCIe has become the standard for high-speed expansion bus connections in modern computer systems, offering faster data transfer rates and improved performance compared to older expansion bus standards.

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