I'm running a simulation program written in Fortran and compiled using G77 on a 64bit 8 core PC running Debian. It simulates the magnetic properties of nuclei.
The simulation works for small systems (up to 6 centers) but whenever I try and run a 7 center simulation, it keels over when the memory usage on the PC goes up to 922.1MB. The CPUs only ever get a 13% load.
I'm out of ideas, so was wondering if this 922.1 MB is significant in computing terms

