Re: Is there a problem to use WinXP in a 3 GB memory machine?
- From: Tim Slattery <Slattery_T@xxxxxxx>
- Date: Fri, 30 Nov 2007 08:54:36 -0500
Juan I. Cahis <jiclbchSINBASURA@xxxxxxxxxxxxx> wrote:
Dear friends:
Is there a problem to use WinXP in a 3 GB memory machine?
I understand that WinXP doesn't use more memory than 2 GB, but is
there a problem for XP if the machine has 3 GB of main memory,
independently if XP will use the extra memory or not?
Your understanding is not correct. 32-bit WinXP has a 4GB address
space, as does your 32-bit hardware. The hardware has to use some of
that address space to access video memory, BIOS, etc. What's left over
is used to access your RAM. If you install 4GB, you'll probably be
able to use 3 to 3.5GB. If you install 3GB, you will probably be able
to use all of it. See http://members.cox.net/slatteryt/RAM.html
Your 2GB number probably comes from a misunderstanding of Virtual
memory. Each process running in XP is assigned a 4GB virtual memory
space (meaning that each process thinks it has 4GB RAM all to itself).
This is divided half-and-half between the application and the OS. Any
part of this VM space may be in RAM or on the disk at any particular
time. It's the operating system's job to keep track of all this and
have the right part at the right place when it's needed. It will use
all your physical RAM to keep as much of the various VM spaces as
available as possible.
--
Tim Slattery
MS MVP(Shell/User)
Slattery_T@xxxxxxx
http://members.cox.net/slatteryt
.
- References:
- Is there a problem to use WinXP in a 3 GB memory machine?
- From: Juan I . Cahis
- Is there a problem to use WinXP in a 3 GB memory machine?
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