Can 32 bit Mathematica run program which requires more than 4GB RAM ?
closed as unclear what you're asking by ubpdqn, Öskå, Jens, rasher, bobthechemist Jun 15 at 3:17
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It depends. A single 32-bit Mathematica process certainly cannot access more than 4GB RAM (since the OS also reserves some memory in the virtual memory space, you actually can use even less). However if you have a 64-bit operating system, or a 32-bit operating system using PAE, then all processes together can use more than 4GB of memory (provided you've got installed as much, of course). If you do parallel computations, each Mathematica subkernel runs in a separate process, so while each individually cannot exceed the 4GB limit, all of them together can.
Of course if you use a non-PAE 32-bit operating system, then there's no way to access more than 4GB of memory, neither by Mathematica nor by any other program running on your system.
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