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,

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.

HyperTransport 3.0 also 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.


Version 3.0 builds on the existing HyperTransport 1.0 and 2.0 standards, and 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," sai

d Mario Cavalli, general manager of the HyperTransport Technology Consortium.

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 GHz, 2.4 GHz and 2.6 GHz, and delivers a maximum aggregate bandwidth of 41.6 GBps, a bandwidth increase of 86% over HyperTransport 2.0.

Technical features and benefits of HyperTransport 3.0 include:
AC mode (Optional): An 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 lo