thanks Jason!
On Thu, Nov 29, 2012 at 6:19 PM, Jason Swails <jason.swails.gmail.com>wrote:
> On Thu, Nov 29, 2012 at 5:03 PM, Jonathan Gough
> <jonathan.d.gough.gmail.com>wrote:
>
> > Hi All,
> >
> > I was wondering in terms of performance/accuracy/precision is there any
> > difference between the different EVGA Nvidia GTX 680 GPU's?
> >
> > I thought I remember Jason saying you didn't want the overclocked
> version,
> > but I couldn't figure out what the differences were between certain
> models
> >
> > specifically I am referring to:
> >
> > EVGA 04G-P4-2686-KR GeForce GTX 680 w/ Backplate 4GB 256-bit GDDR5 PCI
> > Express 3.0 x16 HDCP Ready SLI Support Video Card
> >
>
> According to Newegg.com, this card has (at $519):
>
> 1536 CUDA cores
> 4 GB 256-bit GDDR5
> Core clock at 1019 MHz
> Boost Clock at 1084 MHz
> Effective Memory clock at 6008 MHz
>
>
> >
> > EVGA 04G-P4-3687-KR GeForce GTX 680 FTW+ w/Backplate 4GB 256-bit GDDR5
> PCI
> > Express 3.0 x16 HDCP Ready SLI Support Video Card
> >
>
> Also according to Newegg, this card has (at $549):
> 1536 CUDA cores
> 4 GB 256-bit GDDR5
> Core clock at 1084 MHz
> Boost Clock at 1150 MHz
> Effective Memory clock at 6008 MHz
>
> I think all of our applications (i.e., computational science programs) are
> memory-bound. That is, the main determinant of speed these days is how
> quickly the processor can be fed data to crunch. (This is mostly why the
> GPU can run programs so much faster*, as I've been led to understand -- it
> has much more memory bandwidth than CPUs). Therefore, I expect the 6% jump
> in core clock speeds is all but meaningless to pmemd.cuda. You would
> probably not be able to measure a statistically significant difference in
> performance between them.
>
> The far more significant difference is that the second card comes with
> Assassin's Creed 3 and Borderlands...
>
> HTH,
> Jason
>
> --
> Jason M. Swails
> Quantum Theory Project,
> University of Florida
> Ph.D. Candidate
> 352-392-4032
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Received on Thu Nov 29 2012 - 16:30:03 PST
