Today NVIDIA announced fully conformant OpenCL 3.0 for Windows and Linux on Maxwell and later GPUs. Existing OpenCL 1.x based applications will continue to work with NVIDIA’s OpenCL 3.0 drivers without any changes. In addition to full OpenCL 1.2 compatibility, NVIDIA’s OpenCL 3.0 drivers now deliver significant optional OpenCL 3.0 functionality. Developers can try out the R465 drivers with OpenCL 3.0 today.
https://developer.nvidia.com/blog/nvidia-is-now-opencl-3-0-conformant/