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PCI Express 3.0 announced, available in 2010

Posted on Thursday, August 09 2007 @ 16:04:00 CEST by

PCI-SIG announced the approval of 8GT/s as the bit rate for the next-generation PCI Express 3.0 architecture.

PCI Express 2.0 hardware isn't even out yet but PCIe 3.0 is still a couple of years away from us, according to PCI-SIG the first PCIe 3.0 hardware will be available in 2010. The first motherboards and graphics cards with PCIe 2.0 support should arrive later this year.
Following a six-month technical analysis of the feasibility of scaling the PCIe interconnect bandwidth, the data shows that 8GT/s can be manufactured in mainstream silicon process technology, and can be deployed with existing low-cost materials and infrastructure, while maintaining full mechanical compatibility and with negligible impact to the PCIe protocol stack. The 8GT/s bit rate represents a doubling of the delivered bandwidth by removing the requirement for the 8b/10b encoding scheme supported in prior versions of PCIe architecture, which imposed a 20 percent overhead on the raw bit rate. The PCIe 3.0 specification will introduce a number of optimizations for enhanced signaling and data integrity, including transmitter and receiver equalization, PLL improvements, clock data recovery, and channel enhancements for currently supported topologies. The final PCIe 3.0 specifications, including form factor specification updates, may be available by late 2009, and could be seen in products starting in 2010 and beyond.

“Experts in the PCIe Electrical Workgroup analyzed both 10GT/s and 8GT/s as target bit rates for the next generation of PCIe architecture, and after careful consideration of several factors, including power, implementation complexity and silicon area, recommended 8GT/s,” said Al Yanes, PCI-SIG chairman. “This allows us to satisfy the next generation performance requirements for all existing PCIe applications while maintaining backward compatibility, and at the same time broadening the adoption of this pervasive technology into new and emerging applications and usage models.”



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