Just trying to confirm whether PCI-e 2.0 has any huge difference which will affect the part they say about x16 ?
Or is PCI-e 2.0 just the name and x16 is the bus terminal?
To the second question: I believe so.
PCIe 2.0 has several improvements over PCIe 1.0 x16. But if you are concerned about compatibility, a PCIe 2.0 video card will work in a PCIe 1.0, 1.1 x16 slot.