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

• To: mathgroup at smc.vnet.net
• Subject: [mg60616] Re: [mg60581] Mathemaica 5.2 are the 64 Bit an illusion !!!....?
• From: cmduncan at mines.edu
• Date: Thu, 22 Sep 2005 02:08:10 -0400 (EDT)
• References: <200509210720.DAA08022@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Rob,

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
64bit.  

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

Chris
cmduncan at mines.edu


Quoting LumisROB <lumisrob_NOGOOD_ at yahoo.com>:

> 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
> 
> 

• References:
  • Mathemaica 5.2 are the 64 Bit an illusion !!!....?
    • From: LumisROB <lumisrob_NOGOOD_@yahoo.com>