Hi Ross, Scott and all,
Yes.., this card looks to be awesome! I am really
glad that all our predictions agree! I know that the DP is not so important in
Amber now, but this is just an interesting fact:)
If someone is able to get the card soon, please
post some benchmark results here. I will try to get some of them asap too:)
Ross and Scott, when you have time please
comment this:
I know that you're against any GPU's overclock,
but with the current technology and in particular Titan we will have in fact
two choices. First, if someone prefers to work in 1/3 DP mode he will be
restricted to 837MHzby
GPU itself, but if someone decides to use the 1/24 DP the card will automatically
work at the boost speed level of 876Mhz. Moreover, the boost speed can be defined to be more than 900+Mhz. Thus
we have different speeds using same card. Do you think that this wills affects
much the calculations (not speed :) )?
All the best,
Filip
________________________________
From: Scott Le Grand <varelse2005.gmail.com>
To: AMBER Mailing List <amber.ambermd.org>
Sent: Tuesday, February 19, 2013 9:08 PM
Subject: Re: [AMBER] GTX Titan was finally released
GTX 680 is ~75 ns/day (though my 32-bit linux system has seen 77 now and
then)...
I expect 115-120 for GTX Titan...
GTX690 is your throughput bargain while the Titan is just frickin'
awesome...
On Tue, Feb 19, 2013 at 9:58 AM, Ross Walker <ross.rosswalker.co.uk> wrote:
> Hi Marek,
>
> You are comparing the 'wrong' thing. K20 / K20X are HPC cards, this means
> SLOWWWWWW (but green ;-) ). Thus you should really compare the K20X
> performance with the M2090 which is the other HPC card. So there you have:
>
> DHFR/NVE
>
> M2090 = 43.74 NS/day
> K20X = 89.13 ns/day
>
>
> So that's a more than doubling in performance which is pretty much in line
> with Moore's law.
>
> The GTX Titan you should compare against the GTX680 as they are both
> gaming cards. And thus FASSSTTTT (and hot!). There you'll be looking at
> 54.46ns/day and I expect about 115ns/day or so for the GTX Titan board so
> yeap pretty much Moore's law as well.
>
> So I am not sure what numbers you were looking at to say the performance
> difference was not big. Perhaps you looked at the TRPCage numbers which is
> the first plot on the page and GB? That won't tell you much since it is
> only 304 atoms! There you are pretty much at the parallel limit so it
> doesn't benefit from the extra cores in the new cards. I might move the
> implicit solvent benchmarks to the bottom of the page to avoid this
> confusing people. For comparison you should really look at the explicit
> solvent benchmarks on the amber page:
>
> http://ambermd.org/gpus/benchmarks.htm#Benchmarks
>
> With regards to your question about optimization for K20. There is
> potential for about another 30% performance improvement or so but this is
> quote a bit of work and has to be balanced against adding more features.
>
> All the best
> Ross
>
>
> On 2/19/13 8:55 AM, "Marek Maly" <marek.maly.ujep.cz> wrote:
>
> >Hi Filip and all,
> >
> >I just obtained offer to test K20 here:
> >
> >http://www.nvidia.co.uk/object/k20-gpu-test-drive-uk.html
> >
> >so it forced me to check actual Amber benchmarks where K20/K20x
> >results are already present so one may compare
> >their performance e.g. to GTX680.
> >
> >http://ambermd.org/gpus/benchmarks.htm
> >
> >
> >as anybody can see the increase of performance
> >is not so overwhelming.
> >
> >So in this context I do not understand Filip's
> >
> >"much much faster" .
> >
> >much much faster THAN WHAT ???
> >
> >Perhaps not than K20/K20x if yes why ?
> >
> >Anyway I would be grateful for any comments regarding so small
> >performance increase of the new architectures K20/K20x
> >comparing to GTX608.
> >
> >I am not sure but if I remember well there was some
> >opinions that the new Kepler will be about
> >5x times faster (maybe not than GTX680 which is K104 based
> >but than fermi based GTX580 which is also not true)
> >
> >Is there problem, that the Amber code is still not fully
> >optimised for K20 and the actual patch 14 just allowed
> >to use Amber on these new generation GPUs but it will
> >need some more code improvements in order to use all
> >the advantages of the new Kepler architecture ?
> >
> >
> > Best wishes,
> >
> > Marek
> >
> >
> >
> >
> >
> >
> >Dne Tue, 19 Feb 2013 17:40:12 +0100 filip fratev <filipfratev.yahoo.com>
> >napsal/-a:
> >
> >> Hi Ross and all,
> >>
> >> After a lot of rumors the GTX Titan card was
> >> released today. For the first time on any consumer-level NVIDIA card,
> >> double precision (FP64)
> >> performance is uncapped. That means 1/3 FP32 performance, or
> >> roughly 1.3TFLOPS theoretical FP64 performance. Thus this card is very
> >> similar
> >> (same for Amber use) to Tesla K20x, but costs 1000$ and will be much
> >>much
> >> faster! I suppose that Titan will break the 100+ ns threshold on JAC
> >> test with
> >> Amber 12 and have no patience to see some test results!
> >> All the best,
> >> Filip
> >> _______________________________________________
> >> AMBER mailing list
> >> AMBER.ambermd.org
> >> http://lists.ambermd.org/mailman/listinfo/amber
> >
> >
> >--
> >Tato zpráva byla vytvořena převratným poštovním klientem Opery:
> >http://www.opera.com/mail/
> >
> >_______________________________________________
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> >http://lists.ambermd.org/mailman/listinfo/amber
>
>
>
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Received on Tue Feb 19 2013 - 12:30:02 PST
