[gmx-users] 4 x Opteron 12-core or 4 x Xeon 8-core ?

[Berk Hess]

Hi,

For systems or your size, they should run about equally fast.

Berk

> From: davidmcgivenn at gmail.com
> To: gmx-users at gromacs.org
> Subject: Re: [gmx-users] 4 x Opteron 12-core or 4 x Xeon 8-core ? 
> Date: Thu, 20 Jan 2011 14:39:14 +0100
> 
> Dear Carsten,
> 
> Thanks for the advice!
> 
> The thing is that considering the price differences, we could buy 2-3  
> AMD machines (48 core) for each 1 Intel machine (32) core.
> 
> I'm only curious about how much faster Intel will be. Side to side,  
> amd 48core vs intel 32core, would make us talk about 2x differences in  
> ns/day?
> 
> Thanks again.
> 
> Regards,
> David
> 
> >
> > Message: 1
> > Date: Thu, 20 Jan 2011 13:45:54 +0100
> > From: Carsten Kutzner <ckutzne at gwdg.de>
> > Subject: Re: [gmx-users] 4 x Opteron 12-core or 4 x Xeon 8-core ?
> > To: "Discussion list for GROMACS users" <gmx-users at gromacs.org>
> > Message-ID: <DBA5ECBB-D1F3-4559-A849-FB8CF16C918F at gwdg.de>
> > Content-Type: text/plain; charset=us-ascii
> >
> > Hi David,
> >
> > On Jan 20, 2011, at 1:21 PM, David McGiven wrote:
> >
> >> Dear Gromacs Users,
> >>
> >> We're going to buy a new server for HPC. It is going to run mainly  
> >> Gromacs calculations.
> >>
> >> Regarding Gromacs performance, I'm wondering which one, you Gromacs  
> >> users and developers, think will be faster.
> >>
> >> AMD Server :   4 x AMD Opteron 6176 12-core 2.3 Ghz + 96GB Memory  
> >> (2GB / core)
> >> Intel Server : 4 x Intel Xeon 8-core 2.66 Ghz + 64 GB RAM (2GB /  
> >> core)
> >>
> >> We normally run ~100k atom systems with PME and explicit water.
> >>
> >> Which one would you recommend ?
> >>
> >> Also, of course, AMD Server is cheaper. But we are mainly  
> >> interested on performance.
> >
> > If you have a fixed amount of money, you will get the most ns/day
> > if you buy the AMD Magny Cours machines. Each one will be slower  
> > compared to the
> > Intel server but you will get more servers altogether, thus more total
> > performance. If you can only buy a single server and you do not care  
> > about
> > what it costs, the Intel will be faster for shure.
> > Note that you do not need 2 GB/core for 100k atoms MD systems if you  
> > run
> > Gromacs. Half of it will be more than enough.
> >
> > Carsten
> >
> >
> >> Thanks.
> >>
> >> Best Regards,
> >> David
> >>
> >>
> >> -- 
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> >
> >
> > --
> > Dr. Carsten Kutzner
> > Max Planck Institute for Biophysical Chemistry
> > Theoretical and Computational Biophysics
> > Am Fassberg 11, 37077 Goettingen, Germany
> > Tel. +49-551-2012313, Fax: +49-551-2012302
> > http://www.mpibpc.mpg.de/home/grubmueller/ihp/ckutzne
> >
> >
> 
> -- 
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