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Hyper-Transport 2 is coming

Hyper-Transport 2 is coming

Version 2 of the hyper-transport technology licensed by many well-known companies such as AMD, Apple, Nec, Nvidia and VIA should come onto the market in a good two years, then with a data rate of at least 25 GB/s, at the moment 12.8 GB/s are achieved.

The new version 2 should work twice as fast as before , that means that 3.2 GB/s per pin pair is transferred. With 32 channels this would result in 12.8 GB/s in each direction, i.e. 25.6 GB/s together. In contrast to the PCI-Express technology propagated by Intel, which also has 12.8 GB/s, these are effective transfer rates, as 2 clock bits do not have to be transferred for every 8 data bits. Version 2 of Hyper-Transport should also use a trick known from broadcast technology, the so-called pre- and de-emphasis. Among other things, a sensor increases or decreases the signal level for certain bit patterns. Technicians at AMD have already achieved data rates of 5 GBit/s with this technology in laboratory tests.

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