[Pw_forum] Minimum requirement system

[mohsen modaresi]

Dear
Yes of course
Thanks

On Mon, Nov 30, 2009 at 8:15 PM, Giuseppe Mattioli <
giuseppe.mattioli at mlib.ism.cnr.it> wrote:

> I hope that 4MB RAM are actually 4GB RAM...:-)
> Anyway, in my opinion you need at least 8GB, or you will miss systems
> containing more than about 500 electrons. If you can afford it, the best
> choice would be 8 cores and 16 GB...
> Hope this help
>
>
> Giuseppe
>
>
> On Monday 30 November 2009 17:08:54 mohsen modaresi wrote:
> > Dear users
> > These are my choices, System with 4cores and 4MB RAM and 8cores with 4MB
> > RAM, Is there many deferences between this two system for runing Q.E?
> > Thanks
> >
> >
> > On Mon, Nov 30, 2009 at 1:05 PM, mohsen modaresi
> >
> > <modaresi.mohsen at gmail.com>wrote:
> > > Dear Lorenzo
> > > Thanks for your answer
> > >
> > > Mohsen Modaresi
> > >
> > > On Mon, Nov 30, 2009 at 12:17 PM, Lorenzo Paulatto <paulatto at sissa.it
> >wrote:
> > >> Replying to message "[Pw_forum] Minimum requirement system" from
> mohsen
> > >>
> > >> modaresi (30/11/09):
> > >> > I want buy a new computer for my PWscf calculation
> > >> > what is your suggestion? (minimum requirement please)
> > >> > Thanks for your answers
> > >>
> > >> Dear Mohsen,
> > >> it depends on the size of the system you are going to study, and on
> what
> > >> you want to study.
> > >>
> > >> I usually run small molecules (less than 20 electrons) on my laptop,
> > >> systems with about 100 electrons on at least 32 processors (with
> > >> dedicated high-speed network connection and filesystem), systems with
> > >> about 1000 electron require at the very least 128 processors.
> > >>
> > >> best regards
> > >>
> > >>
> > >> --
> > >> Lorenzo Paulatto
> > >> SISSA & DEMOCRITOS (Trieste)
> > >> phone: +39 040 3787 511
> > >> skype: paulatz
> > >> www:
> > >> http://people.sissa.it/~paulatto/<http://people.sissa.it/%7Epaulatto/>
> <http://people.sissa.it/%7Epaulatto/>
>
> > >>
> > >> *** save italian brains ***
> > >> http://saveitalianbrains.wordpress.com/
> > >> _______________________________________________
> > >> Pw_forum mailing list
> > >> Pw_forum at pwscf.org
> > >> http://www.democritos.it/mailman/listinfo/pw_forum
>
>
> --
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>
> Giuseppe Mattioli
> CNR - ISTITUTO DI STRUTTURA DELLA MATERIA
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