Dear<br>Yes of course<br>Thanks<br><br><div class="gmail_quote">On Mon, Nov 30, 2009 at 8:15 PM, Giuseppe Mattioli <span dir="ltr"><<a href="mailto:giuseppe.mattioli@mlib.ism.cnr.it">giuseppe.mattioli@mlib.ism.cnr.it</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div style="font-family: 'Arial'; font-size: 10pt; font-weight: 400; font-style: normal;">
I hope that 4MB RAM are actually 4GB RAM...:-)<br>
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...<br>
Hope this help<br>
<p style="margin: 0px; text-indent: 0px;"><br></p>Giuseppe<div><div></div><div class="h5"><br>
<p style="margin: 0px; text-indent: 0px;"><br></p>On Monday 30 November 2009 17:08:54 mohsen modaresi wrote:<br>
> Dear users<br>
> These are my choices, System with 4cores and 4MB RAM and 8cores with 4MB<br>
> RAM, Is there many deferences between this two system for runing Q.E?<br>
> Thanks<br>
><br>
><br>
> On Mon, Nov 30, 2009 at 1:05 PM, mohsen modaresi<br>
><br>
> <<a href="mailto:modaresi.mohsen@gmail.com" target="_blank">modaresi.mohsen@gmail.com</a>>wrote:<br>
> > Dear Lorenzo<br>
> > Thanks for your answer<br>
> ><br>
> > Mohsen Modaresi<br>
> ><br>
> > On Mon, Nov 30, 2009 at 12:17 PM, Lorenzo Paulatto <<a href="mailto:paulatto@sissa.it" target="_blank">paulatto@sissa.it</a>>wrote:<br>
> >> Replying to message "[Pw_forum] Minimum requirement system" from mohsen<br>
> >><br>
> >> modaresi (30/11/09):<br>
> >> > I want buy a new computer for my PWscf calculation<br>
> >> > what is your suggestion? (minimum requirement please)<br>
> >> > Thanks for your answers<br>
> >><br>
> >> Dear Mohsen,<br>
> >> it depends on the size of the system you are going to study, and on what<br>
> >> you want to study.<br>
> >><br>
> >> I usually run small molecules (less than 20 electrons) on my laptop,<br>
> >> systems with about 100 electrons on at least 32 processors (with<br>
> >> dedicated high-speed network connection and filesystem), systems with<br>
> >> about 1000 electron require at the very least 128 processors.<br>
> >><br>
> >> best regards<br>
> >><br>
> >><br>
> >> --<br>
> >> Lorenzo Paulatto<br>
> >> SISSA & DEMOCRITOS (Trieste)<br>
> >> phone: +39 040 3787 511<br>
> >> skype: paulatz<br>
> >> www: <br></div></div>
> >> <a href="http://people.sissa.it/%7Epaulatto/" target="_blank">http://people.sissa.it/~paulatto/</a><<a href="http://people.sissa.it/%7Epaulatto/" target="_blank">http://people.sissa.it/%7Epaulatto/</a>><div class="im">
<br>
> >><br>
> >> *** save italian brains ***<br>
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<p style="margin: 0px; text-indent: 0px;"><br></p> Giuseppe Mattioli <br>
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