What is PCI ExpressR 4.0e


Xmultiple's Engineering Department

What is PCI ExpressR (PCIeR) 4.0 and What are the requirements for this evolution of the PCIe architecture?

PCIe 4.0 is the next evolution of the ubiquitous and general-purpose PCI Express I/O specification. The bit rate for the PCIe 4.0 specification will be 16GT/s. At 16GT/s bit rate, the interconnect performance bandwidth will be doubled over the PCIe 3.0 specification, while preserving compatibility with software and mechanical interfaces. The key requirement for evolving the PCIe architecture is to continue to provide performance scaling consistent with bandwidth demand from a variety of applications with low cost, low power and minimal perturbations at the platform level. One of the main factors in the wide adoption of the PCIe architecture is its sensitivity to high-volume manufacturing capabilities and materials such as FR4 boards, low-cost connectors and so on. The PCIe 4.0 architecture is compatible with prior generations of this technology,

The final PCIe 4.0 specifications, including form factor specification updates, are expected to be available in late 2015. The timing of the specification maturity is a function of the participation and contributions of PCI-SIG members as the technical workgroups consider and debate technology choices, capabilities and analyses.

Xmultiple will release the PCI 4.0e connector as the specifications becomes closer to becoming a standard. Today the specification is maturing however there are many tests and measurement criteria which have to be completed. PCIe technology is a main focus of Xmultiple's future product offerings.


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