I need GPU with CUDA support and open-source community support for FFT computation with Matlab R2015b. I think I need to reject nVidia GPUs because of bad open-source support, here Torvalds about nVidia's open-source development. So I am thinking some AMD GPU's which has a development plan for open-source support of CUDA, here press release. I need to do GPU computation because my system's RAM (16 GB/32 GB) is fully utilized in the computation process. I plan to split all FFT computationt into GPU, which the documentation says should be possible here.
Is AMD GPU FirePro support enough yet for Linux's Matlab and CUDA?