25112 Rev. 3.06 September 2005

Software Optimization Guide for AMD64 Processors

When compared with traditional technologies, HyperTransport technology allows much faster data- transfer rates. For more information on HyperTransport technology, see the HyperTransport I/O Link Specification, available at www.hypertransport.org.

HyperTransport™ Technology

On AMD Athlon 64 and AMD Opteron processors, HyperTransport technology provides the link to I/O devices. Some processor models—for example, those designed for use in multiprocessing

systems—also utilize HyperTransport technology to connect to other processors. See the BIOS and Kernel Developer's Guide for your particular processor for details concerning HyperTransport

technology implementation details.

Appendix A Microarchitecture for AMD Athlon™ 64 and AMD Opteron™ Processors

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AMD 250 manual HyperTransport Technology, 261