no worries. :) Already RMA's 2x Titans and bought 2x Zotacs. Will check 'em
tomorrow. If they are good will order another 2.
Thanks again for testing them.
On 27 June 2013 19:43, Ross Walker <ross.rosswalker.co.uk> wrote:
> The GTX780s do not appear to be broken - we are just being cautious right
> now.
>
> The Titan's are broken for everyone right now - well broken for anyone who
> actually hits what they are broken with - which is still being
> investigated. But certainly for anyone who uses cuFFT the Titan's appear
> to broken right now.
>
> All the best
> Ross
>
>
>
> On 6/27/13 11:20 AM, "ET" <sketchfoot.gmail.com> wrote:
>
> >Are they "broken" only in terms of AMBER? Or could this be classed as a
> >general hardware fault pertaining to all applications that use the card?
> >
> >
> >
> >
> >On 27 June 2013 18:50, Scott Le Grand <varelse2005.gmail.com> wrote:
> >
> >> It's not really a question of how it's programmed, it's a question of
> >> manufacturing. One picks 12 out of 15 processor cores on the chip
> >>itself
> >> to make a GTX 780 as opposed to picking 14 out of 15 processor cores to
> >> make a GTX Titan. In the former, there are 455 ways to do so and in the
> >> latter, 15.
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Wed, Jun 26, 2013 at 7:13 PM, ET <sketchfoot.gmail.com> wrote:
> >>
> >> > Thanks very much for the quick information guys! It's much
> >>appreciated.
> >> >
> >> > I'm not that up on the manner in which these cards are programmed, so
> >>am
> >> a
> >> > little confused by your explanation Scott. could you please clarify it
> >> for
> >> > me?
> >> >
> >> > br,
> >> > g
> >> >
> >> >
> >> > On 27 June 2013 01:47, Scott Le Grand <varelse2005.gmail.com> wrote:
> >> >
> >> > > 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
> >> > > > be read every day, and should not be used for urgent or sensitive
> >> > issues.
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > > > _______________________________________________
> >> > > > AMBER mailing list
> >> > > > AMBER.ambermd.org
> >> > > > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > >
> >> > > _______________________________________________
> >> > > AMBER mailing list
> >> > > AMBER.ambermd.org
> >> > > http://lists.ambermd.org/mailman/listinfo/amber
> >> > >
> >> > _______________________________________________
> >> > AMBER mailing list
> >> > AMBER.ambermd.org
> >> > http://lists.ambermd.org/mailman/listinfo/amber
> >> >
> >> _______________________________________________
> >> AMBER mailing list
> >> AMBER.ambermd.org
> >> http://lists.ambermd.org/mailman/listinfo/amber
> >>
> >_______________________________________________
> >AMBER mailing list
> >AMBER.ambermd.org
> >http://lists.ambermd.org/mailman/listinfo/amber
>
>
>
> _______________________________________________
> AMBER mailing list
> AMBER.ambermd.org
> http://lists.ambermd.org/mailman/listinfo/amber
>
_______________________________________________
AMBER mailing list
AMBER.ambermd.org
http://lists.ambermd.org/mailman/listinfo/amber
Received on Thu Jun 27 2013 - 14:00:04 PDT
