Re: Windows and extra RAM?

["Derek Martin-9" <user=7@nabble.blu.org>]

 On Wed, Nov 21, 2007 at 03:17:20PM -0500, Scott Ehrlich wrote: 
> [I know this is list is *NIX-based, but there is enough 
> Windows-based knowledge for this kind of question] 
> 
> I have been asked to install Windows XP (32-bit) on a brand new 32 
> GB RAM system.   Since XP can only address up to 4 GB [1], does the 
> rest of the RAM go to  waste, or is it actually used in other ways? 

The Windows XP operating system is only able to address 4GB IN TOTAL, 
and thus any RAM you have above that is not able to be used.  In fact, 
since most PCI devices are memory mapped, they use up some of that 
address space, and actually you will not even be able to use all of 
the 4GB, as some of that address space will be reserved by your PCI 
devices. 

The per-process memory limit in Windows XP is actually 2GB by default, 
and 3GB maximum.  Windows 2003 and Vista support > 4GB using PAE on 
32-bit processors that support PAE, but XP does not. 

-- 
Derek D. Martin    http://www.pizzashack.org/   GPG Key ID: 0xDFBEAD02 
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