[gmx-users] benchmark: buying a new cluster

[Berk Hess]

Hi,

Where did you get this 10% number?
I would expect that for Gromacs the performance is linear with the clock frequency
and the FSB does not matter much. Thus the difference is only 5%.
I would rather have 20% more nodes.

Berk.

----------------------------------------
> Date: Mon, 5 May 2008 10:58:13 +0200
> From: spitaleri.andrea at hsr.it
> To: gmx-users at gromacs.org
> Subject: [gmx-users] benchmark: buying a new cluster
> 
> Hi all,
> we are going to buy a new cluster and we are in doubt about the frequency to consider.
> Basically, we have the possibility to buy either 18 nodes dual quad-core (18x8 cores) bearing
> Intel-Xeon E5430 2.66 MHz and FSB 1333 MHz or 15 nodes dual quad-core (15x8 cores) bearing
> Intel-Xeon E5462 2.8 MHz and FSB 1600 MHz. The latest seems to be **only** 10% faster then the first.
> However, thinking to the new gromacs4, we are in doubt about the best solution. Is it better to have
> a **nominal** 10% cpu faster or to have 24 further cores?
> 
> Thanks in advance for any welcome suggestion,
> 
> Regards
> 
> andrea
> 
> 
> -- 
> -------------------------------
> Andrea Spitaleri PhD
> Dulbecco Telethon Institute
> c/o DIBIT Scientific Institute
> Biomolecular NMR, 1B4
> Via Olgettina 58
> 20132 Milano (Italy)
> http://biomolecularnmr.ihsr.dom/
> Tel: 0039-0226434348/5622/3497/4922
> Fax: 0039-0226434153
> -------------------------------
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