I posted this on another forum and nobody really knew the answer. I bought this EVGA nForce 680i motherboard from Newegg. I realized while it was en route to my house that I want a PCI-Express 2.0 slot so I can get a screaming video card, but Newegg's specs page only lists a "PCI Express Graphics expansion slot". I posted it on the other forums, and everybody told me that it wasn't a PCI-E 2.0 slot.
So, I was looking at something else, when I discovered that the same motherboard was listed as having a 2.0 slot. So, I went to Newegg and looked at some of the product pictures, and the mysterious 'expansion slot' sure looks an awfully lot like 2.0 slots I saw via google images.
The board you have pictured has two PCI express 1.0 x 16 slots. They are the blue and black connectors labeled PCIE 16x on the picture. It's not redundancy that puts those two PCIE 1.0 x 16 slots there. It's the board's capability to run two PCIE express cards and in SLI if you wish.
you can. all pci-e cards are backwards are forwards compatible, but they may be limited by the bandwith of the slot.
*May* being the key word. A 16x PCIe 1.x slot can transfer 4 GB/s in each direction; that is plenty of bandwidth for current gen and most likely even next gen cards. PCIe 2.0 is handy when you're working with 8x slots, since you can get the 8GB/s of bandwidth with only 8 lanes