did the sodium pentothal yield results, or did the perps induce vomiting
with the aid of a salt shaker; then careen across the rooftops using the
black arts of parkour, whilst you gave chase in a military helicopter armed
with a sniper rifle? :P
On 27 June 2013 19:36, Scott Le Grand <varelse2005.gmail.com> wrote:
> We don't have enough information yet, and I want to stress that my theory
> on 780 is just that - neither Ross nor I have encountered a broken one yet.
>
>
>
>
> On Thu, Jun 27, 2013 at 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.
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
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Received on Thu Jun 27 2013 - 12:30:02 PDT
