HyperTransport

A high-speed interconnection architecture between integrated circuits, introduced in 2001. Code-named Lightning Data Transport and developed by AMD and others, the HyperTransport I/O Link Specification defines a protocol and electrical interface between the CPU, memory and peripheral devices.

Since its introduction, HyperTransport's maximum aggregate bandwidth of 32-bit links progressed from 12.8 to 41.6 Gbytes/sec. Version 3.0 also added dynamic link splitting under software control. Called "Un-Ganging," it enables a single unidirectional link to be split into two; each at half the original bit width. HyperTransport (HT) was designed to be fully compatible with legacy PCI (running at 33 or 66 MHz) plus PCI Express and PCI-X technologies. For more information, visit the HyperTransport Consortium at www.hypertransport.org.

HYPERTRANSPORT VERSION               HT 1.x   HT 2.0   HT 3.0Feature        (2001)   (2004)   (2006)

 Clock speed    800 MHz  1.4 GHz  2.6 GHz

 Bandwidth
  (GB/sec)       12.8     22.4     41.6

 Hot pluggable   No       No       Yes

 Un-Ganging      No       No       Yes

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General detailsCo New ZOTAC GeForce 8100Co High-performance value platformCo NVIDIA GeForce 8100 graphics processorCo AMD dual, tri and quad-core Phenom, Athlon and Sempron compatibleCo Socket AM2+Co HyperTransport 3.0Co MicroATX form factorCo PCI Express 2.0 x16 expansionCo DirectX 10 with Shader Model 4.0 compatibleCo NVIDIA Hybrid SLI readyCo NVIDIA GeForce Boost readyCo NVIDIA HybridPower readyCo Six-channel high-definition audioCo 10/100 EthernetCo DVI and VGA output

ZOTAC Launches High-performance Value Platform New ZOTAC GeForce 8100 delivers DirectX 10 GPU and HyperTransport 3.0 support to low-cost platform

There are another dozen communications processors that link to the HyperTransport buses on the Opterons to provide a high-speed link to the switching fabric that connects all of the shelves in a massively parallel machine to each other.

Cray Buys Opteron-Linux HPC Upstart OctigaBay for $115m

-- Dual AMD Opteron Processor 200 Series - CPU Built-in 1MB L2 cache -- Three HyperTransport links providing up to 19.2 GB/s peak bandwidth per processor -- 128-bit Dual Channel Memory Controller - Integrated in CPU -- Simultaneous 32- and 64-bit computing capability

DIGITAL AUDIO WAVE DEBUTS DAWIN-64 DIGITAL AUDIO WORKSTATION

In addition, AMD HyperTransport 3.0 technology (HT3) increases interconnect rates from 2 gigatransfers per second (GT/s) up to a maximum 4.8GT/s.

HP announces Six-Core AMD Opteron-based workstation

General details* New ZOTAC GeForce 8100* High-performance value platform* NVIDIA GeForce 8100 graphics processor* AMD dual, tri and quad-core Phenom, Athlon and Sempron compatible* Socket AM2+* HyperTransport 3.0* MicroATX form factor* PCI Express 2.0 x16 expansion* DirectX 10 with Shader Model 4.0 compatible* NVIDIA Hybrid SLI ready* NVIDIA GeForce Boost ready* NVIDIA HybridPower ready* Six-channel high-definition audio* 10/100 Ethernet* DVI and VGA output

ZOTAC Launches High-performance Value Platform New ZOTAC GeForce 8100 delivers DirectX 10 GPU and HyperTransport 3.0 support to low-cost platform

The buses and protocols addressed include CAN, SPI, RS-232, SATA, SAS, PCIe, FibreChannel, Serial Rapid 10, and HyperTransport.

Understanding gained one layer at a time

InfiniPath is the industry's lowest latency Linux cluster interconnect, delivering SMP-class performance to commodity-priced Linux clusters while leveraging important standards such as HyperTransport technology, InfiniBand, MPICH and AMD64 Direct Connect Architecture.

PATHSCALE OPTIMIZES EKOPATH/INFINIPATH TO SUPPORT OPTERON

With this exceptional flexibility, the Hydra core supports a number of standards and data rates including, but not limited to Gigabit Ethernet, SGMII, XAUI, CX-4, Serial RIO, Parallel RIO, SFI4.1, SPI4.2, SPI5, and HyperTransport. The unique in-system selectable LVDS and PCML I/Os allow the design of single ports that support both LVDS-based and PCML-based interfaces such as SPI4.2 (LVDS) and XAUI (PCML).

LSI DEBUTS HYDRA SERIALIZER/DESERIALIZER CORE