Intel's mixup with PCIe 1.1 and PCIe 2.0 ?

[idata]

Hi Everyone,

While browsing datasheets today on the newish i5 chipsets, I came across the 3400series chipset. ( http://www.intel.com/Assets/PDF/datasheet/322169.pdf http://www.intel.com/Assets/PDF/datasheet/322169.pdf )

On Page 44 I noticed this paragraph:

PCI Express* Interface The PCH provides up to 8 PCI Express Root Ports, supporting the PCI Express Base Specification, Revision 2.0. Each Root Port supports 2.5 Gb/s bandwidth in each direction (5 Gb/s concurrent). PCI Express Root Ports 1-4 and Ports 5–8 can be independently configured as four x1s, two x2s, one x2 and 2 x1s, or one x4 port widths.

I thought....strange? Revision 2.0?

Because earlier I was reading page 49 of the Intel 82801 ( http://www.intel.com/Assets/PDF/datasheet/313056.pdf http://www.intel.com/Assets/PDF/datasheet/313056.pdf )

and saw this paragraph:

PCI Express* Interface

The ICH8 provides up to 6 PCI Express Root Ports, supporting the PCI Express Base

Specification, Revision 1.1. Each Root Port supports 2.5 Gb/s bandwidth in each

direction (5 Gb/s concurrent). PCI Express Root Ports 1–4 can be statically configured

as four x1 Ports or ganged together to form one x4 port. Ports 5 and 6 can only be used

as two x1 ports. On Mobile platforms, PCI Express Ports 1–4 can also be configured as

one x2 port (using ports 1 and 2) with ports 3 and 4 configured as x1 ports.

After reading some comments on the Wikipedia page for PCIe about Intel and PCIe 2.0, and some sort of confusion that happened......I was completely lost as to which information was correct.

With the i5 chipset - shouldn't the bandwidth of PCIe 2.0 be double that of PCIe 1.1??

Which data here is correct? Where is the typo?

cheers

Nick

[idata]

The Series-5 mobile chipsets are PCI-e 2.0 only for power management. They still transmit at 2.5GT/s. Intel's latest Series-6 can transit at 5.0GT/s.