Capability 1.1 only added atomic operations in global memory - everything else stayed pretty much the same.

As far as I know the capability 1.0 only existed on the original G80 die, e.g. the 8800GTX, the 8800GT.

I think the 9800 series was based on the G92 die (an architectural re-spin of G80). so it is likely it has Compute 1.1.

And then also they added the GT200 die which added double precision support and was also sold as the first Tesla cards for professional use. That's what my GTX 260 cards were based off. But now they've reached end of life for me

Christian