With another installation (Femap11.0 with Nastran8.5 on Win7 64bit) the I/O-Tranfer is much smaller and needs only a few secons, causing a run time of <1min.
I would like also to use my older license (FEMAP 9.3.1 bzw NX.Nastran 5.1), so my question is:
Is there any means (parameter, configuration, ?) to do the run faster with my old installation?
Solved! Go to Solution.
Windows XP has poor I/O performance. You can probably add multiple SSD disk drives to alleviate this issue. The disk drives need to be software RAID striped (RAID0).
The only other alternative is to reduce the amount of stress output requested.
Can you update to the recent released version of NX Nastran (version 9.0)?
You are solving a model using a very old NX NASTRAN 5.1 solver on a "modern" Windows XP x64 bits pltaform (well, XP is considered obsolete just now). But please check if your NX NASTRAN 5.1 is for sure running as a 32-bits application in a x64-bit platform, in this case not matter if you have 8 GB RAM because the NX NASTRAN 5.1 solver only will address 2 GB RAM per process.
I have revised my records (see my WEB site at http://www.iberisa.com/productos/nxnastran/nx_nastran_v60.htm) and in NX NASTRAN 6.0 of June 2008 -six years ago!!- a mention exist under Numerical Performance "Improved performance for Windows64 and Linux x86-64 platforms", but with NX Nastran 5.0 of April 2007 not any mention exist, then I don't know if the solver take advanced of x64 platforms with RAM memory above 2 GB RAM.
In summary, NX NASTRAN 5.1 is a very old solver, with serious limitations in hardware architecture, I don't know the reason why you try to use such quite old version, but if you are running a 32-bits solver, then the use of MEM=4GB is useless at all. I suggest to update to NX NASTRAN 9.0 modern version.