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April 28, 2006
HyperTransport 3.0 Specification Released
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HyperTransport Technology Consortium, a standards organization dedicated to developing the industry's lowest latency, highest bandwidth interconnect technology, has released version 3.0 of the HyperTransport specification. The new standard nearly doubles the bandwidth and speed of the previous HyperTransport 2.0 specification. In addition, HyperTransport 3.0 supports a variety of new features including AC coupling mode, hot plugging, un-ganging mode and dynamic power management for the support of extended signal transmission distance, typical of backplane and chassis-to-chassis implementations. HyperTransport 3.0 builds on the existing HyperTransport 1.0 and 2.0 standards which continue to be designed into systems at an accelerating rate, and have helped HyperTransport reach considerable market presence and success. HyperTransport 3.0 is fully backwards-compatible with earlier versions of the HyperTransport specification standard.
"The added performance and new features of HyperTransport 3.0 extend the applicability of HyperTransport technology from chip-to-chip and board-to-board, all the way to chassis-to-chassis applications," said Mario Cavalli, general manager of the HyperTransport Technology Consortium. "HyperTransport has proven to be the industry's most flexible, powerful and future-ready standard interconnect solution for compute-intensive system designs, delivering a winning combination of high-performance, standardization and optimized total cost of ownership for data center and supercomputing applications."
There are over 40 million HyperTransport technology-enabled systems in perhaps the industry's widest range of applications for interconnect technologies. HyperTransport technology is deployed in applications ranging from high-performance embedded systems to personal computing, workstations, servers, supercomputers and clusters.
HyperTransport 3.0 extends the 1.4 GHz dual data rate (DDR) maximum clock of HyperTransport 2.0 to 1.8 GHz, 2.0 GHz, 2.4 GHz and 2.6 GHz, and delivers a maximum aggregate bandwidth of 41.6 gigabytes per second (GB/s) -- a bandwidth increase of 86 percent over HyperTransport 2.0.
"As processor performance continues to rise, and the industry increasingly moves toward a new generation of multi-core technology, multi-CPU system designs, interconnect latency and bandwidth take on a pivotal role in overall system and application performance," said David Rich, president of the HyperTransport Consortium. "By further reinforcing HyperTransport's industry position as the lowest latency, highest bandwidth interconnect technology, HyperTransport 3.0 enables designers to achieve state-of-the-art application performance and optimum time-to-market advantages while benefiting from the combined economies of scale of a widely adopted interconnect standard and a full array of off-the-shelf systems and components."
Technical Features and Benefits of HyperTransport 3.0
-- AC mode (Optional) - An innovative AC interconnect mode complements HyperTransport's traditional DC mode, featuring capacitor coupling, AC/DC auto-sensing and auto-configuring capabilities. The feature extends HyperTransport's maximum signal transmission distance to 1 meter at maximum specified clock speed with no signal transmission or performance degradation. As a result, the HyperTransport standard can now support long-haul signal transmission typical of backplane and chassis-to-chassis applications. During power-up and in total transparency to system software, HyperTransport 3.0 auto-senses the presence of coupling capacitors (AC) and/or direct connections (DC) within the HyperTransport interconnect fabric and automatically configures each portion of it accordingly.
-- Hot plugging - HyperTransport technology-enabled devices can be added to or removed from the HyperTransport fabric without disrupting system operations. HyperTransport cards, systems and subsystems can therefore be deployed in backplane and mission-critical platforms requiring high system availability.
-- Un-ganging mode (Optional) - During system power-up and transparently to system software, 1x16 HyperTransport links can optionally be configured as 2x8 virtual links. This gives system architects extended interconnect flexibility and the ability to fully leverage existing HyperTransport components and cores. Un-ganging mode is particularly valuable in multiprocessor and symmetric multiprocessing environments.
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