PCIkortti

PCIkortti, also known as PCI Express, is a high-speed serial computer expansion bus standard, designed to replace the older PCI, PCI-X, and AGP bus standards. It was developed by the PCI Special Interest Group (PCI-SIG) and was first introduced in 2003. The standard is used for the expansion of internal components such as graphics cards, network cards, and storage devices.

PCIe is a point-to-point serial bus, which means that each device is connected directly to the CPU via a dedicated lane. This allows for higher data transfer rates and better performance compared to the older parallel bus standards. The number of lanes in a PCIe slot determines its bandwidth. For example, a PCIe x1 slot has one lane, while a PCIe x16 slot has sixteen lanes.

PCIe is also used in other applications beyond computer expansion, such as in data centers, telecommunications, and automotive industries. It is known for its high-speed data transfer capabilities, low power consumption, and small form factor, making it a popular choice for modern computing systems.

The PCIe standard has undergone several revisions since its introduction, with each revision bringing improvements in speed, power management, and other features. The latest revision, PCIe 5.0, was released in 2019 and supports data transfer rates of up to 64 GT/s, which is more than four times faster than the previous revision, PCIe 4.0.