Feeds

PCI organisation confirms PCIe 3.0 delay

Six-month setback to ensure full backwards compatibility

Choosing a cloud hosting partner with confidence

The next version of the PCI Express bus standard, 3.0, won't appear until 2010 and not this year as originally anticipated.

Publication of the final version of the specification inevitably leads the appearance of devices that incorporate the standard, so the delay pushes the release of PCIe 3.0-compliant kit out from 2010 to 2011.

The delay was confirmed by PCI Special Interest Group President Al Yanes. Speaking to PC Magazine, he said the delay was necessary to ensure that the complex new standard retains backwards compatibility with PCIe 1.0 and PCIe 2.0.

PCIe 3.0 ups the bus' clock to 8GHz. It also ups the previous version's data-encoding schemes fro 8/10-bit to 128/130-bit. One upshot of changing the encoding scheme is that the cost to data transfer is reduced from 20 per cent to around 1-2 per cent, ensuring more real data is sent at any given clock cycle.

That means PCIe 3.0 will have an effective bandwidth of 7.99Gb/s, compared to the 5Gb/s-rate PCIe 2.0's effective bandwidth of 4Gb/s. That's a doubling of bandwidth without the need to aim for 10Gb/s with all the greater signalling issues that 10GHz brings over 8GHz.

The downside is the extra work Yanes and co. think necessary to ensure backward compatibility and the six-months-or-so delay to the standard's release. ®

Security for virtualized datacentres

Whitepapers

A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.