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Re: Mathemaica 5.2 are the 64 Bit an illusion !!!....?

  • To: mathgroup at
  • Subject: [mg60616] Re: [mg60581] Mathemaica 5.2 are the 64 Bit an illusion !!!....?
  • From: cmduncan at
  • Date: Thu, 22 Sep 2005 02:08:10 -0400 (EDT)
  • References: <>
  • Sender: owner-wri-mathgroup at


I believe that the 64 bit only runs on a 64 bit system; not on 'any system'.
Run Mathematica v5.2 with the 64bit on a Linux (64bit) or WinXp X64 (64 bit).
Secondly, you can verify rather quickly if you have more than 2.5 Gigs of
physical memory; b/c if you are not in 64bit environment than you should be
capped at the 2.5Gigs or so.  Try running your test on a system running within
64bit environment; Windows XP is not 64bit but Windows XP x64 Professional is

**I have tested my v5.2 on WinXP (x64) and had no problems.  I also have 16
of physical memory also showing up as 16Gigs.  It ran very quick to on a 4 dual
core Opterons ... yummy!**

cmduncan at

Quoting LumisROB <lumisrob_NOGOOD_ at>:

> Verified to fund both on Windows that on other OS : Mathematica 5.2
> and the 64 bit are an illusion. You try on any system to create 4
> numerical random matrixes of 10^4*10^4 elements (they should occupy
> around 4GB.Mathematica uses the packeds array in which every number of
> car occupies 8 bytes) but.... mathematica interrupts the calculation
> for lack of memory . A tool that it affirms to be to 64 bit doesn't
> have to do this...... or no?
> Thanks for the help
> Rob

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