NVIDIA vs AMD: GPGPU performance

Question

I\'d like to hear from people with experience of coding for both. Myself, I only have experience with NVIDIA.

NVIDIA CUDA seems to be a lot more popular than the competi

Answer 1

I would like to add to the debate. For us in the business of software, we can compromise raw single-precision performance to productivity but even that I do not have to compromise since, as already pointed out, you cannot achieve as much performance on on ATI's hardware using OpenCL as you can achieve if you write in CUDA on NVIDIA's hardware.

And yes, with PGI's announcement of x86 compiler for CUDA, there won't be any good reason to spend more time and resources writing in OpenCL :)

P.S: My argument might be biased since we do almost all our GPGPU work on CUDA. We have an Image Processing/Computer Vision library CUVI (CUDA for Vision and Imaging) which accelerates some core IP/CV functionality on CUDA.