To clarify, there are 15 SMXs in a GK110 GPU. For GTX Titan, one of them
is disabled. There are 15 (15 choose 1) ways to do this. All of them seem
to be broken.
There are 12 out of 15 active SMXs in GTX 780. That means there are 455 (15
choose 3) ways to make one. I'm a little nervous that some of those
configurations may be broken, so the best thing to do is to test if they
exhibit deterministic behavior upon acquiring them, and if they don't, RMA
them as defective.
On Wed, Jun 26, 2013 at 4:31 PM, Ross Walker <ross.rosswalker.co.uk> wrote:
> Hi All,
>
> Ok, good news on the GTX780 front. After 4 days of testing neither Scott
> nor myself have been able to break the GTX780s. This is in a 4 x GTX780
> Exxact system although at present we have only tested multiple single GPU
> runs using all 4 GPUs at once - I.e. pmemd.cuda (NOT pmemd.cuda.MPI) - I
> will be testing pmemd.cuda.MPI shortly but I don't see why this wouldn't
> work given single GPU is working fine.
>
> Key though is that there are multiple ways to build GTX780s, and for now
> we have only tested one specific model which is as follows:
>
> http://tinyurl.com/prxlwy6 Zotac GTX780 ZT-70201-10P
>
>
> Until we have an opportunity to test different vendor GTX780s and OC
> versions the advice is to stick with the above model if you can.
>
> All the best
> Ross
>
> /\
> \/
> |\oss Walker
>
> ---------------------------------------------------------
> | Associate Research Professor |
> | San Diego Supercomputer Center |
> | Adjunct Associate Professor |
> | Dept. of Chemistry and Biochemistry |
> | University of California San Diego |
> | NVIDIA Fellow |
> | http://www.rosswalker.co.uk | http://www.wmd-lab.org |
> | Tel: +1 858 822 0854 | EMail:- ross.rosswalker.co.uk |
> ---------------------------------------------------------
>
> Note: Electronic Mail is not secure, has no guarantee of delivery, may not
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Received on Wed Jun 26 2013 - 18:00:02 PDT
