[Pw_forum] IS DUAL CORE 2.7 GHz, 2GB RAM SUFFICIENT FOR QE calculations??

[ashkan shekaari]

dear siddheshwar

i ran a supercell system made of 48 atoms on a computer server with
120 cores and 6 GB of RAM , but it didn't work . my calculations
failed , it needs more than 6 GB of RAM .

On 7/23/14, siddheshwar chopra <sidhusai at gmail.com> wrote:
> Dear Ashkan,
> How much large RAM do you mean? Is it 4GB in total or more? I can add
> another 2GB hence.
>
> Regards,
>
>
> On Wed, Jul 23, 2014 at 6:50 AM, ashkan shekaari <shekaari at gmail.com>
> wrote:
>
>> yes , but you can not run any supercell calculations or defected systems
>> .
>>
>> for these calculations you should have a large amount of memory (RAM) .
>>
>> On 7/22/14, siddheshwar chopra <sidhusai at gmail.com> wrote:
>> > Dear Users,
>> > I am new to QE and really need an estimate about the computational
>> > resources needed to run magnetic, phonon, optical and band structure
>> > calculations for light, medium and heavy atoms of around 60 atoms
>> > supercell. I currently have a dual core 2.7 GHz processor with 2GB RAM,
>> > HDD=250GB. Please suggest me so that I can run calculations without any
>> > memory of processor issues.
>> > I have Windows XP and also Linux mint installed on the same machine. I
>> have
>> > also increased the virtual memory per partition.
>> > I also now how to make an external USB drive work as system RAM. Will
>> that
>> > help me?
>> >
>> > Kind Regards,
>> >
>> > --
>> > *Dr. Siddheshwar chopra,*
>> >
>> >
>> > *M.Sc., Ph.D (Physics)Assistant Professor (Physics),*
>> > *Amity University, Noida, India.*
>> >
>>
>>
>> --
>> Best wishes
>> Ashkan Shekaari
>> _______________________________________________
>> Pw_forum mailing list
>> Pw_forum at pwscf.org
>> http://pwscf.org/mailman/listinfo/pw_forum
>>
>
>
>
> --
> *Dr. Siddheshwar chopra,*
>
>
> *M.Sc., Ph.D (Physics)Assistant Professor (Physics),*
> *Amity University, Noida, India.*
>


-- 
Best wishes
Ashkan Shekaari