An Introduction to the Intel QuickPath Interconnect

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Executive Summary

With its high-bandwidth, low-latency characteristics, the Intel QuickPath Interconnect advances the processor bus evolution, unlocking the potential of next-generation microprocessors. The 25.6 GB/s of low-latency bandwidth provides the basic fabric required for distributed shared memory architectures. The inline CRC codes provide more error coverage with less overhead than serial CRC approaches. Features such as lane reversal, polarity reversal, clock fail-over, and self-healing links ease design of highly reliable and available products. The two-hop, source snoop behavior with cache line forwarding offers the shortest request completion in mainstream systems, while the home snoop behavior allows for optimizing highly scalable servers.

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