Hi, For systems or your size, they should run about equally fast.
Berk > From: davidmcgiv...@gmail.com > To: gmx-users@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 <ckut...@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@gromacs.org> > > Message-ID: <dba5ecbb-d1f3-4559-a849-fb8cf16c9...@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 > >> > >> > >> -- > >> gmx-users mailing list gmx-users@gromacs.org > >> http://lists.gromacs.org/mailman/listinfo/gmx-users > >> Please search the archive at > >> http://www.gromacs.org/Support/Mailing_Lists/Search > >> before posting! > >> Please don't post (un)subscribe requests to the list. Use thewww > >> interface or send it to gmx-users-requ...@gromacs.org. > >> Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > > > > > -- > > 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 > > > > > > -- > gmx-users mailing list gmx-users@gromacs.org > http://lists.gromacs.org/mailman/listinfo/gmx-users > Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/Search before posting! > Please don't post (un)subscribe requests to the list. Use the > www interface or send it to gmx-users-requ...@gromacs.org. > Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
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