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Low-latency interconnect delivers value

Posted: 01 Aug 2005 ?? ?Print Version ?Bookmark and Share

Keywords:hypertransport? interconnect? low-latency? scalable? motherboard?

Rich: HyperTransport technology is well-positioned for continued growth over the next five to 10 years.

While some high-speed interconnect technology proponents are still trying to persuade the industry that a single standard is the superior one-size-fits-all solution, market leaders are letting specific application requirements drive their choice of which technology is best. In many cases, the best interconnect solution will include more than one high-speed interconnect technology, each performing the functions for which they are optimized.

HyperTransport technology is currently known as a high-volume solution in the high-performance system world that delivers the lowest-latency, highest-bandwidth technology for processor-to-processor and processor-to-I/O applications. Reasons for the growing adoption of HyperTransport are simpleit is a flexible, scalable point-to-point interconnect solution that delivers the best of parallel and serial bus characteristicslow latency, low overhead, 22.4Gbps bandwidth in 2- to 32-lane architectures.

As a front-side bus, HyperTransport technology has been integrated in processors from Advanced Micro Devices, PMC-Sierra, Broadcom, and Transmeta. This makes HyperTransport a universal high performance means of integrating I/O streams in single and multiprocessor systems. It simplifies the design and cuts the cost of multiprocessor systems that share local memory and I/O devices.

When processor-native, HyperTransport eliminates the need for a north bridge. As a standalone I/O technology, HyperTransport links south and north bridge devices and integrates multiple I/O streams into a "fat pipe" to the processor. It is often used as a bridge to other I/O technologies and is designed to interoperate smoothly with AGP, PCI, PCI-X, PCI-Express, SPI-4 and Infiniband.

The recent HTX HyperTransport expansion specification extends the benefits of the low-latency HyperTransport link to daughterboard solutions. This new motherboard connector/daughterboard specification defines a low-cost expansion solution using popular, low-cost connectors. This gives system and subsystem developers a means of tapping directly into the high-speed processor communications channel, thus increasing performance and simplifying design.

HyperTransport technology is well-positioned for continued growth over the next five to 10 years. Its flourishing infrastructure provides HyperTransport-enabled products and services with over 60 shipping or announced products. HyperTransport technology is a ubiquitous standard that is being leveraged in many next-generation designs.

- David Rich
HyperTransport Consortium

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