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