Run PCIE-2 in PCIE-1

[yuan87]

i wanna buy a Zotac GTX275 Amp! edition for my mb
what i know it's run in PCIE-2
will it run in my PCIE-1 bus type?
thanks a lot

 

[TheGreatGrapeApe]

What model Mobo?

PCIe 1.0, 1.0a, 1.1?