OGL Shader Debugging

Can someone from Nvidia tell us which of their cards support shader debugging?
I read through all the questions here about that issue. What I was able to conclude that only Fermi and Kepler architectures have the ability to debug shaders enabled.
I have bough a GeForce 600 (kepler) just for that purpose, however I do no see it working with Nsight to debug shaders.
So again, which cards or architecture are able to debug shaders, i.e. support placing breakpoints inside shader code?

Thank you for using Nsight Graphics and sorry you are running into this issue with wanting to do shader debugging. The standalone version of Nsight Graphics does not support shader debugging. We know that shader debugging would serve a key need for many developers and so it is something we regularly evaluate relative to our full priorities and hope to deliver in the future.