Bus specification designed to supersede PCI. PCI Express (PCIe) provides several improvements over its predecessor:
- It enables Quality of Service (QoS) which is a means to prioritise more time critical traffic (like an audio or video stream) to reduce break up.
- Supports multiple lanes that can be aggregated for a single link to provide increased bandwidth. (Each lane can transmit up to 2.5gb/sec, and the protocol supports up to 32x)
- Uses a point-to-point bus topology where a shared switch replaces the shared bus that PCI used.
NB: PCI-Express is sometimes referred to as 3rd generation I/O (3GIO)architecture.
Sites 7
Ars Technica: PCI Express: An Overview
Technical overview explaining basic PC system architecture, an explanation of how PCI and PCI-X work, and an outline of the benefits of PCIe, and PCIe to PCI bridging.
Intel.com
Developer network for PCI Express architecture. Offers overview of the specification, introductory videos, details of books for developers, press releases and how to join the network.
PCI Express Compliance Testing
Gives an overview of the requirements for PCI Express Compliance testing.
PCI-SIG
Standards development group. Offers details of technology specifications, document review and compliance testing, test software and checklists and press releases.
Wikipedia
Article outlining the components of the protocol and competing formats.
Neoseeker.com
Article including a technology overview, comparison with older buses and considerations of its future prospects.
(April 21, 2004)
AnandTech
Article covering history of the bus market and an explanation of how the specification works.
(December 06, 2003)
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Last update:
June 18, 2015 at 2:23:09 UTC