GPU crunching question

[Devaster]

i found small problem - nagas fft is single precision only but seti need double precision right ?

[Vyper]

i found small problem - nagas fft is single precision only but seti need double precision right ?

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

Keep up the good work..

[Devaster]

i must go trought a rapidmind docs i have seen there a double precision mode .....

[Josef W. Segur]

i found small problem - nagas fft is single precision only but seti need double precision right ?

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]

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

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.

[johnjohngoose]

Also, if it's any help, I have a Core Duo 2.0 Ghz w/ Win XP SP2 (or Mac OS X 10.4) and an ATI X1600 card and I'm willing to test too. I have .NET 2.0.

Alternatively, I can test stuff on a couple of other systems. A Core 2 w/ XP SP2 and an ATI X1900 Pro and a couple of others.

Just in case I can be of any help.

[citroja]

Has anyone seen/heard from Hans Dorn recently?  He was working on a GPU cruncher but his site was down for a while and I haven't seen him in the S@H forums recently either???

-citroja

[Devaster]

ee hans is still off ... may be he have a problems vith nvidia and his NDA...

[Simon]

I've emailed Hans, but have not received a reply yet.

Not sure what's the matter, I really hope he's all right.

Regards,
Simon.

[Devaster]

for now my -0.0.1 version is running on 6600 with nagas GPUFFT and some routines in rapidmind enviroment (power spectrum) now i am working on trig calcs ...

this runtime may running on all cards where run a GLSL language ....


stay tuned and be patient because i must deal my free time between girlfriend,seti code and ffdshow (i)dct on GPU ....

[citroja]

I am decent with fft(s) and trig calcs...let me know if you want me to look over your code / algorithm.

-citroja

[Devaster]

now iam moving whole develpment enviroment to vista so  i must rewrite some parts ....

[Vyper]

Please do

I've got a Vista x64 system with a 8800GTX ready to hit .. So report when there's something u want us to test ..

Good Luck with porting the S@H client..

Kind Regards Vyper

[citroja]

IMO it is much more beneficial to S@H to be able to port the app to the older (nVidia 6x-7x) cards since there is a larger group of people that have them already.  but again this is just my opinion.

-citroja

[Devaster]

i think too ...
my code work on ANY card with GLSL and ARB ....