Forum > GPU crunching

Why a fallback mode.

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Jason G:
The SLI thing seems to be an issue that comes & goes with various drivers.  I had thought nVidia had left things that Cuda sees through Sli & ignores it, so a bit weird.  I suppose that monster card is relatively new & so they might still be messing around with some basics in the drivers & Cuda runtime. 

Probably Cuda 4.1 release will understand that card a bit better. There is a prototype (not for release) 4.1rc1 build of x41g in the dev area that appears to perform 'interestingly' on the 480 & 560ti here.  If you have time to give that a run, that & newer drivers might be happier on that setup.  nVidia apparently also want dev feedback on the new compiler performance in particular, so any weird issues like that I could pass on. I've already passed on some positive & negative reports, but for 'us' I think 4.1 release will be a worthy migration (when they get to final release stage).

Jason

MarkJ:

--- Quote from: Jason G on 04 Dec 2011, 10:43:03 am ---Probably Cuda 4.1 release will understand that card a bit better. There is a prototype (not for release) 4.1rc1 build of x41g in the dev area that appears to perform 'interestingly' on the 480 & 560ti here.  If you have time to give that a run, that & newer drivers might be happier on that setup.  nVidia apparently also want dev feedback on the new compiler performance in particular, so any weird issues like that I could pass on. I've already passed on some positive & negative reports, but for 'us' I think 4.1 release will be a worthy migration (when they get to final release stage).

Jason
--- End quote ---

I have a 560Ti in one machine. Would you like me to give it a run?

I would probably have to update drivers 1st though. Any "recommended" version to try or just the latest whql? Machine is a Q6600 with 4Gb RAM running Win 7 x64.

Jason G:

--- Quote from: MarkJ on 07 Dec 2011, 04:47:51 am ---I have a 560Ti in one machine. Would you like me to give it a run?

I would probably have to update drivers 1st though. Any "recommended" version to try or just the latest whql? Machine is a Q6600 with 4Gb RAM running Win 7 x64.
--- End quote ---

Might as well hold at x41g v3.2 build for now If that runs stably for you. Definitely please report anything that seems wrong.  Fred's queries, and the queries about '-12's are appreciated as reminders & checks of the shifting priorities as some problems are knocked off the list. 
 4.1rc1 is already replaced by Cuda 4.1rc2  since that post :D.  Some issues, not related to 560ti's but Pre-Fermis,
have been reported to nVidia, and probably once they address those I'll try get as wide a pre-release testing going as possible (and allowed).  Until then the logic in the 3.2 build should serve to prove the foundations. 4.1 release probably won't be long, whether or not they fully addressed all the issues yet.

Jason

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