Re: 64 bit cpu and Mathematica on windows.

*To*: mathgroup at smc.vnet.net*Subject*: [mg52246] Re: 64 bit cpu and Mathematica on windows.*From*: David Bailey <dave at Remove_Thisdbailey.co.uk>*Date*: Wed, 17 Nov 2004 02:20:14 -0500 (EST)*References*: <200411150115.UAA25002@smc.vnet.net> <200411150817.DAA29819@smc.vnet.net> <cnbn1s$9ur$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Just a little further information. First, there has been a good, stable beta of Windows XP for AMD64 available (free) for some time. For once, Intel are playing catchup and just starting to produce "64-bit extended" chips that are compatible with the AMD hardware. The AMD 64-bit design is extremely neat for a lot of reasons. In particular, if you run a 64-bit operating system you can run both 32-bit and 64-bit code. 32-bit applications - such as your regular Mathematica for Windows - can then address more or less the whole 4-Gigabyte address space (rather than a typical 1.5G) because the operating system runs in 64-bit mode even when it is servicing 32-bit applications - so it does not use up any of the 4G theoretical limit. The 64 bit Mathematica should be able to address a vast quantity of memory. Of course, to be able to access all this memory it has to be physically present on your machine. I probably sound as though I work for AMD, but I don't - I just like their 64-bit design! David Bailey

**References**:**64 bit cpu and Mathematica on windows.***From:*sean_incali@yahoo.com (sean kim)

**Re: 64 bit cpu and Mathematica on windows.***From:*DrBob <drbob@bigfoot.com>