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GPU crunching question

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Gecko_R7:
Devastater:   So, if a person was running S@H on C2D and had a graphics card, BOINC would recognize the GPU as a 3rd processor and manage the GPU's own client?  Well, even if the GPU lost 10% performance, being able to run the CPU clients simultaneously appears to be quite a gain in aggregate vs. GPU-only crunching at 100%.

This sounds pretty darn cool!  ;D
Good luck!

Alex Kan:
Devaster: Neither of the data points you've picked for fft.exe are representative of SETI's FFT workload--SETI doesn't do two-dimensional FFTs, and spends much more time doing FFTs with lengths between 16K and 128K than it does any other lengths.

Also, if you're using the standard MFLOPS = 5 N log2(N) / (1000 * time in ms) metric for FFT performance, those times strike me as a bit on the low side. A lot of those speeds seem no faster than (or worse, slower than) doing the same computations on the CPU with tuned libraries. Does RapidMind provide built-in functionality for computing FFTs?

Devaster:
from my side : for me  is not important if fft on gpu is more speedy or not but is in that you are using additional compute power to crunching ....

pepperammi:
This article at all useful or interesting? bit over my head to be honest  ;)
http://arstechnica.com/news.ars/post/20070227-8931.html

EastWind:
The peak MIPS showed here so far is less than 1GFlops. I checked my overclocked PD830(3780MHz), it has 2.69 GFLOPs for 62.4 credit work units. Does it mean the present GPU program is a bit too slow?

I ran GPU FFTW on my Nvidia 6200TC graphics previously, the speed is fater than FFT on my amd64 4400+ (at 2600MHz) cpu. The 6200 graphics cards just has two pixel pipe lines (eg 8 procesors). Does it mean if the GPU FFT program provided here can be improved further ?

I heard GPU speed at folding@home is about 59GFlops on average compared to 0.89GFlops on CPU. see statistics below

OS Type                Current TFLOPS*    Active CPUs    Total CPUs
Windows                   148                    155670         1607204
Mac OS X/PowerPC        7                     8518              94537
Mac OS X/Intel              6                      2112              5936
Linux                          29                      20504           209163
GPU                           39                       662              1984
Total                         229                   187466            1918824

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