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Windows 7: PCI Express 3.0 Spec Nears Completion


27 Jun 2010   #1

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64
 
 
PCI Express 3.0 Spec Nears Completion

Quote:
The PCI Special Interest Group released a detailed timetable for the next-generation PCI Express 3.0 specification on Wednesday, with a final specification due by the fourth quarter and products possibly in early 2011.

The schedule for PCIe 3.0 products is somewhat flexible, however, given the wiggle room in the specification.

It's safe to say, however, that the spec is nearing the end of its technical revisions. In a press conference, PCI SIG chairman Al Yanes said that he had met with the workgroup chair on Tuesday, and that "we're basically done, technically."

PCI Express 3.0 is the next generation of the PCI Express specification, the main data pathway of the graphics cards and other expansion technologies of today's PCs. PCIe 2.0 encodes data using either 8 or 10 bits, transferring data at 5 gigatransfers per second, a metric that's governed by the number of lanes assigned to the channel. (Most graphics cards use a 16-lane, or x16, slot.)

PCIe 3.0, on the other hands, extends the bit encoding to either 128- or 130-bit encoding, and the data rate to 8 gigatransfers per second. Yanes and the SIG said an x16 PCIe 2.0 slot would transfer up to 16GBps of bandwidth; a PCIe 3.0 x16 slot would transfer 32 GBps.

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27 Jun 2010   #2

Linux (Debian, Android)
 
 

32 GBps on PCIe 3.0 x16? That's faster than a 20-lane QPI at 3.2 Ghz which achieves 25.6 GB/s.

I wonder why you would need all that bandwidth maybe 40 or 100 GbE NICs, or SATA 6 Gbit/s RAID cards.
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28 Jun 2010   #3

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64
 
 

It will catch up to the new SATA 6 Gbit/s ports that are showing up on MOBOs already

Maybe new graphics cards that will take the place of two in SLI or CF, bigger faster single cards.
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 PCI Express 3.0 Spec Nears Completion




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