How much does a pre-2.0 PCI-E board bottleneck a 2.0 card?

I am still fairly new to PC hardware and when I upgraded my gpu to an ATI 3870 I wasn't aware of the difference between PCI-E 2.0 and prior versions, what the differences are, etc. Well my motherboard is Intel's Badaxe 2, like my username and am all but certain it's 1.0 or 1.1. The 3870 still works in it, and I'm getting good results, but back to the question of how much of a bottleneck if any is using a 2.0 card on a board like this? I searched for results on this topic but nothing specific was showing up.

Much thanks to anyone who can help shed some light on this topic.

Thanks.

Well that's good news. So in other words the memory speeds on newer cards are still well within the bandwidth capacities of PCI-E 1.0, and this is the only real difference between 1.0 and 2.0?

Works for me, thanks.

Q: How much does a pre-2.0 PCI-E board bottleneck a 2.0 card?
A: ZERO.

Also HD's still do make use all the bandwith of a ATA connection.
While your thinking about it look at the Mbps HD's read/write vs the USB 1.0 standard...and they want to come out with a 3.0?!

You may expect todays top end/brand new MB's to die of old age l-o-n-g befor hardware uses all their bandwith.

dagger that tweaktown article doesnt prove anything as both the x48 and p45 chipsets have PCI-e2.0

Yes, it doubles bandwidth.
http://en.wikipedia.org/wiki/PCI_E [...] xpress_2.0
A single pcie2.0x8=pcie1.0/1.1x16. Which is why I linked that article. pcie1.0x8=pcie2.0x4.

I give to you Tom's PCIe 2.0 Scaling Review.
As PCIe 2.0 doubles the bandwith of PCIe 1.1, compare PCIe 2.0 @ 16x to PCIe 2.0 @ 8x.
You will probably want to check the 9800GX2 benchies as it requires about the same or a little more bandwith than a GTX 280 or more than a 4870.
Bottom line is that you will see minimal to no bottlenecking with any current GPU in a 16x PCIe 1.1 slot.