It doesn't look like NVIDIA's product, CUDA 5.0 is compatible for AMD graphics cards.
The importance of CUDA 5.0 is that it allows for ease of video rendering, or so adobe After Effects pop-up message tells me so.
Does AMD have it's own computer graphics optimizer program? If they do, do they give you a free downloadable version?
AMD GPUs can use OpenCL acceleration instead of Cuda. I would recommend checking with Adobe to see if the applications you are interested in using support OpenCL GPU acceleration.