'Designed for PCI Express Gen.3 Support' clarification wanted

[yinx]

I'm confused by this statement.

http://uk.gigabyte.com/products/product-page.aspx?pid=3759#ov

I have a GA-P67A-UD4-B3 (rev 1.1) with a Sandy Bridge processor. On the overview page it says there is support for PCI-e Gen.3. What does this mean?

What I understand is that with the latest BIOS upgrade and an Ivy Bridge processor I can run a videocard on PCI-e 3.0, despite the fact that the chipset (P67) only supports 2.0.

Let's say I upgrade to Ivy Bridge, upgrade my BIOS and buy a PCI-e 3.0 compatible GPU. At what speed would I be able to run PCI-e 3.0? Would it be x16 or x8? Currently I'm running PCI-e 2.0 x16, which has a bandwith of 8000 MB/s. I've read posts about people claiming that in that case it would only be PCI-e 3.0 x8, which is also 8000 MB/s.

Some one please clarify this to me. Thanks!

[yinx]

I'm amazed how Gigabyte fails me to explain this. I even tried to contact them directly... no answer.

Appalling support.

[dmdilks]

By what you are reading is that yes with the bios update you should be able to run at 3.0 & x16.

But understand that these boards were not really design to do this when they built them. 

There is a lot of people that have done this and run into a lot of problems too. 

I myself I play around with it but I would buy a board and cpu that were really design to do it. 

Not what they are trying to do with a older board that might not work.