Has anyone done any CUDA programming. I've tried posting questions on a dedicated CUDA form, but the forum is kinda buggy.

So, just in case someone knows something about it, I have a dumb question. I am trying to get started with cuda on a laptop with a 520M card, running Gentoo. Is it possible to execute CUDA programs while the card is supporting graphics on the machine or does it need to be dedicated? I'm not expecting performance I just want to see it work.

The reason I ask is that everything I have tried, compiles and executes without errors but returns zeros from the GPU. I have tried sample code and even tried just sending data and retrieving it with out executing any kernels. No matter what I do, I just come back with zeros.