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The Evolution of PCI Express®

PCI stands for Peripheral Component Interconnect, and it is a common connection interface attaching different computer components to a motherboard. It was introduced back in the early 90u2019s by a group of engineers in Intel, AMD, and other companies. The PCIu00a0busu00a0was available in bothu00a032-bitu00a0andu00a064-bitu00a0versions. The technology went through several updates to evolve to PCI Expressu00ae, which is under constant development through generations.

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The Evolution of PCI Express®

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  1. The Evolution of PCI Express®

  2. PCI stands for Peripheral Component Interconnect, and it is a common connection interface attaching different computer components to a motherboard. It was introduced back in the early 90’s by a group of engineers in Intel, AMD, and other companies. The PCI bus was available in both 32-bit and 64-bit versions. The technology went through several updates to evolve to PCI Express®, which is under constant development through generations.

  3. PCIe® was initially named as HSI (for High-Speed Interconnect), and later 3GIO (for 3rd Generation I/O) before getting the PCI-SIG name PCI Express®. PCI Express® provides a point-to-point interconnect solution for communication between two devices.

  4. PCIe® Gen1 was introduced in 2003 and supported a transfer rate of 2.5GT/s and a data rate of 250MB/s per lane. With technological improvements, people began looking for higher speed and performance.

  5. This led to the introduction of PCIe®  Gen 2 came with 5.0GT/s per lane transfer speed and double the throughput to 500MB/s per lane along with several feature improvements.This version was however backward-compatible with the earlier version.

  6. The third generation of PCIe® was introduced in 2010 as the requirement to handle more complex data demanded enhanced power and speed. This was a revolutionary product with a bit rate of 8GT/s. This was quite enough to transfer a 30GB HD movie in less than a second.

  7. The requirement for speed and accuracy didn't stop there. Artificial intelligence that helps in developing and executing decisions with accuracy far beyond human capabilities and Big Data analysis that computes forecast models at blinding speeds using dedicated GPU from AMD, NVIDIA, Qualcomm, etc. started catching the trend, which led to the introduction of PCIe® 4.0 in 2017.

  8. This generation offered improved flexibility, scalability, and lower power with 16GT/s bit rate which was double the bandwidth offered by PCI Express 3.0.

  9. Earlier in 2019, PCIe® introduced its latest version, PCIe® 5.0, with 32GT/s transfer rate. It also has improved signal integrity and is backward-compatible with CEM connectors for add-in cards.

  10. PCI-SIG has already announced the progress of PCI Express 6.0 specification which is expected to launch by early 2021 doubling the data rate to 64GT/s. 

  11. Amphenol ICC has supported these improvements in developing solutions for each generation and has evolved along. Our solutions include : PCIe®Gen 3 Card Edge PCI Express® Gen 4 and Gen 5 Card Edge  PCIe® M.2 Gen 3 and Gen 4 Card Edge

  12. For more interesting topics and updates please visit: www.amphenol-icc.com/connect

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