Does a GPU that supports CUDA support OpenCL?
Given that in version 4.1 of the OpenCL Programming Guide (PDF) Nvidia is explicitly talking about CUDA-enabled GPUs (especially in Appendix A), I think we can safely assume that these CUDA-enabled cards also support OpenCL. Moreover, OpenCL on Nvidia hardware still uses the CUDA architecture.
Appendix C of the same document lists support for various extensions based on specific computing power.
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