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've done some iterative coding in OpenCL. And the results of running it in NVIDIA and ATI, are pretty much the same. Near the same speed in the same value ($) cards.

In both cases, speeds were ~10x-30x comparing to a CPU.

I didn't test CUDA, but I doubt it could solve my random memory fetch problems magically. Nowadays, CUDA and OpenCL are more or less the same, and I see more future on OpenCL than on CUDA. The main reason is that Intel is launching drivers with OpenCL for their processors. This will be a huge advance in the future (running 16, 32 or 64 threads of OpenCL in CPU is REALLY fast, and really easy to port to GPU).