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GPU crunching question
Devaster:
i found small problem - nagas fft is single precision only but seti need double precision right ?
Vyper:
--- Quote from: Devaster on 01 Mar 2007, 03:42:35 pm ---i found small problem - nagas fft is single precision only but seti need double precision right ?
--- End quote ---
I presume so..
If ur a good coder, why don't you try the CUDA way from Nvidia?
U actually can compile a Cuda based FFT but you have to divide the S@H chunks into smaller FFT pieces and then merge the result.. ATM Cuda can only calculate maximum 16384 large FFTs...
There is a developer mode so u can emulate the code , if u want i can test. Own a 8800GTX based gfx just to hope to see a CUDA S@H app and to play forthcoming crysis :D
Keep up the good work..
Devaster:
i must go trought a rapidmind docs i have seen there a double precision mode .....
Josef W. Segur:
--- Quote from: Devaster on 01 Mar 2007, 03:42:35 pm ---i found small problem - nagas fft is single precision only but seti need double precision right ?
--- End quote ---
No, setiathome_enhanced uses single precision FFTs. (I think it also did before _enhanced, but would have to go look at the source to be sure.)
Joe
johnjohngoose:
--- Quote ---I heard GPU speed at folding@home is about 59GFlops on average compared to 0.89GFlops on CPU. see statistics below
--- End quote ---
Yes, but that's all the different CPUs vs all the different GPSs. The X1800, X1900, and X1950 ATI video cards supported by Folding at the moment are a lot newer and more powerful on average than the CPUs that are crunching. I mean, there must be a good number of P3's, etc still mixed in there.
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