Jacob Wrote: >All this is discussed extensively at >http://www.mersenneforum.org/showthread.php?t=10275
Thanks for the link to that thread, but I don't see any mention of GPUs capable of double-precision FP operations in that thread at all. It was all talk of why current GPUs aren't capable of speeding up the current software. Reading some more info on the GTX280, nVidia is claiming that their double FP output is equal to an 8-core Xeon. If their double-precision really does adhere to the IEEE spec and they aren't taking any shortcuts, I don't see any reason why you couldn't port to a CUDA-based FFT. Seeing that GPUs are now at the point of becoming feasible targets for LL testing, wouldn't it be worthwhile to start looking into it? (Especially at the price/performance point?) Having not looked at the Prime95 code for 3 or 4 years, how ingrained is the FFT? How feasible would it be to take the FFT code and have it run on the GPU (assuming that someone has written a fairly fast GPGPU FFT already). _______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
