[Pw_forum] Minimum requirement system

[Giuseppe Mattioli]

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/>
> >>
> >>     *** 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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