I was chatting with a product manager at ANSYS, Inc. about HPC. We got on the topic of GPU’s and he pointed out that there is a good article on the ANSYS Advantage magazine website on this very topic.
We get a ton of questions all the time about how GPU’s work and the kind of performance you can get from them. This article goes into some good detail and has benchmarking data on R13. Worth a read!
http://www.ansys.com/magazine/issues/vol4-iss2-2010/AN-Advantage-GPU.pdf