Dear Neelam, I am by no means an expert, but from my limited experience I can say that 4GB of RAM is not a lot, to put it mildly - but at the same time, your system isn't large. In this case, I wouldn't use any parallelization on k-points (pw.x -npool 1) and make use of symmetry as much as possible (correct ibrav instead of ibrav=0). You can save memory by reducing ecutwfc (at the expense of accuracy) - so try choosing pseudopotentials which give you desired accuracy at the lowest ecutwfc (use https://www.materialscloud.org/discover/sssp to guide you). Best, Michal
On Mon, 6 Jul 2020 at 10:27, Neelam Swarnkar <neelamswarnka...@gmail.com> wrote: > Dear expert and all > > I am making the supercell of 2x1x1 total 24 no of atoms, and perform scf > calculation .but there is memory related problem currently i am using 4gb > RAM. > > What can i do to solve this problem? > > Thanks in advance > Neelam > > _______________________________________________ > Quantum ESPRESSO is supported by MaX (www.max-centre.eu/quantum-espresso) > users mailing list users@lists.quantum-espresso.org > https://lists.quantum-espresso.org/mailman/listinfo/users
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