<div dir="ltr"><div><div>Dear Ashkan,<br></div>How much large RAM do you mean? Is it 4GB in total or more? I can add another 2GB hence.<br><br></div>Regards,<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Wed, Jul 23, 2014 at 6:50 AM, ashkan shekaari <span dir="ltr"><<a href="mailto:shekaari@gmail.com" target="_blank">shekaari@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
yes , but you can not run any supercell calculations or defected systems .<br>
<br>
for these calculations you should have a large amount of memory (RAM) .<br>
<div class=""><br>
On 7/22/14, siddheshwar chopra <<a href="mailto:sidhusai@gmail.com">sidhusai@gmail.com</a>> wrote:<br>
> Dear Users,<br>
> I am new to QE and really need an estimate about the computational<br>
> resources needed to run magnetic, phonon, optical and band structure<br>
> calculations for light, medium and heavy atoms of around 60 atoms<br>
> supercell. I currently have a dual core 2.7 GHz processor with 2GB RAM,<br>
> HDD=250GB. Please suggest me so that I can run calculations without any<br>
> memory of processor issues.<br>
> I have Windows XP and also Linux mint installed on the same machine. I have<br>
> also increased the virtual memory per partition.<br>
> I also now how to make an external USB drive work as system RAM. Will that<br>
> help me?<br>
><br>
> Kind Regards,<br>
><br>
> --<br>
</div>> *Dr. Siddheshwar chopra,*<br>
><br>
><br>
> *M.Sc., Ph.D (Physics)Assistant Professor (Physics),*<br>
> *Amity University, Noida, India.*<br>
><br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
--<br>
Best wishes<br>
Ashkan Shekaari<br>
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</font></span></blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr"><div dir="ltr"><span style="color:rgb(204,0,0)"><span style="color:rgb(153,0,255)"><b>Dr. Siddheshwar chopra,</b></span><br></span><span style="color:rgb(116,27,71)"><i>M.Sc., Ph.D (Physics)<br>
Assistant Professor (Physics),<br></i></span></div><span style="color:rgb(116,27,71)"><i>Amity University, Noida, India.</i></span><span style="color:rgb(116,27,71)"><i><br></i></span><br></div>
</div>