Ars Technica
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.
Wikipedia
Article outlining the components of the protocol and competing formats.
Tom's Hardware Guide
Article discussing the impact of PCI Express on the graphics and gaming market, its relative performance compared to AGP, and the responses of the two main graphic cards manufacturers to its introduction.
AnandTech
Article covering history of the bus market and an explanation of how the specification works.
ASIC Architect - PCI Express Endpoint, Rootcomplex, Dual Mode, Switch Port IP Cores for ASIC/FPGA
Endpoint, Rootcomplex, Switch Port IP Cores for PCI Express. Total PCI Express Solution with Design Services and Support from IP Core Integration through Silicon Bring-up.
PCI Express - Challenges & Opportunities
Explains in detail the challenges associated with implementation of PCI Express bus. Also looks at the rewards of going through with the implementation.
PCI Express Compliance Testing
Gives an overview of the requirements for PCI Express Compliance testing.
Official Home Page for ExpressCard Technology from PCMCIA
PC Card form factor for PCI Express.
PCI Express Bus Description
A very concise description of PCI Express Bus and its architecture.
Neoseeker.com
Article including a technology overview, comparison with older buses and considerations of its future prospects.
PCI-SIG
Standards development group. Offers details of technology specifications, document review and compliance testing, test software and checklists and press releases.
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