Next gen PCI-Express, boosts double the speeds
Folks at PCI Express Special Interest Group, also known as PCI-SIG, announced that it has finalised the PCI Express 2.0 specifications. Three months back the specifications had entered release candidate stage.
PCI-SIG unveiled that the new PCI-E 2.0 will boost double the the interconnect bit rate from 2.5 GT/s to 5 GT/s. PCI-SIG describes this bandwidth hike as “by far the most important feature of the PCI Express 2.0 specifications.” Like ethernet, 20% of all signalling on PCIe is dedicated to overhead. Thus for every 10 bits transfered, 8 bits (or 1 byte) are actual data. Thus, doubling the interconnect bit rate increases the aggregate bandwidth of a single PCI Express x16 slot to 16 GBps.
Also it is backward compatible to PCIe 1.1 products. Intel's "Bearlake" family of chipset will supposedly support the PCIe 2.0 specs, if all goes well they are expected to start shipping next quarter.
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