Hi Martin, we have carried out benchmarks on a Barcelona 2.0 GHz versus a 2.3 GHz Clovertown. Here are numbers for an 80000 atom system with PME electrostatics and Gromacs 3.3.1.
On the Barcelona we get a performance of 0.38, 0.71, 1.27 and 2.40 ns/day for 1, 2, 4, and 8 CPUs, respectively. On the Clovertown we get 0.52, 0.97, 1.75, and 2.74 ns/day. So indeed the scaling on the AMDs is much better on 8 CPUs (80% compared to 66%), but the absolute performance is better on the Intels. For a 2.0 GHz Clovertown the absolute performance on 8 CPUs is probably nearly the same as on a Barcelona, but the single-CPU performance will still be better on the Clovertown. One has to keep in mind, however, that this is just a single benchmark and other MD systems might show a different scaling behaviour. Carsten Martin Höfling wrote: > Hi all, > > Barcelona 1.9GHz vs Xeon 2.0GHz > > has anyone here benchmarked these two available 8-core solutions? Speed/core > wins probably the intel side but what about scaling on 8 cores? Has the > NUMA/Hypertransport architecture an advantage here? > > In price, they are very similar. Xeon is of course available with higher > frequencies but also increases in cost/cpu very fast. > > Best > Martin > _______________________________________________ > gmx-users mailing list gmx-users@gromacs.org > http://www.gromacs.org/mailman/listinfo/gmx-users > Please search the archive at http://www.gromacs.org/search before posting! > Please don't post (un)subscribe requests to the list. Use the > www interface or send it to [EMAIL PROTECTED] > Can't post? Read http://www.gromacs.org/mailing_lists/users.php -- Dr. Carsten Kutzner Max Planck Institute for Biophysical Chemistry Theoretical and Computational Biophysics Department Am Fassberg 11 37077 Goettingen, Germany Tel. +49-551-2012313, Fax: +49-551-2012302 http://www.mpibpc.mpg.de/research/dep/grubmueller/ http://www.gwdg.de/~ckutzne _______________________________________________ gmx-users mailing list gmx-users@gromacs.org http://www.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/search before posting! Please don't post (un)subscribe requests to the list. Use the www interface or send it to [EMAIL PROTECTED] Can't post? Read http://www.gromacs.org/mailing_lists/users.php