What is the max addressable memory for XP Home?

  • Thread starter Thread starter klk
  • Start date Start date
Now is a great time to point you to one of the easiest ways to find
information on problems you may be having and solutions others have found:

Search using Google!
http://www.google.com/
(How-to: http://www.google.com/intl/en/help/basics.html )

(You might consider putting *something* in the message body next time.
Even, "Thanks in advance" would have been better than blank. hah)

http://www.google.com/search?q=What+is+the+max+addressable+memory+for+XP+Home
.... might lead you to ...
http://experi3nc3.wordpress.com/2007/12/16/maximum-memory-windows-32bit-utilise/
or
http://www.computing.net/answers/windows-xp/maximum-memory-for-windows-xp-home/166667.html
or
http://www.crucial.com/kb/answer.aspx?qid=4251
(Among others. The latter is pretty definitive - as they wouldn't want you
returning your purchased memory.)

Answer:
4GB is the max supported, 'accessible to your programs' will range between
2.5 and 3.75GB - with anything above 3.25GB being doubtful.

Although - most people who have Windows XP Home will likely never even
utilize a full 1GB - even with a shared memory video card. ;-)
 
In round numbers XP can only address 4GB.
Your video card has XXXMB of ram on the card so
that limits XP to 4GB minus the cards XXXMB of memory.

In addition other hardware also takes away additional amounts of memory
(usually a small when compared to the video card)
and the remaining memory (address space) is available for
Windows XP and your applications.

So that 4th GB of ram you installed or will install is mostly unused.

A link to the white paper titled "Gaming Performance Analysis" by Corsair
Memory Inc. provides a good clear explanation of how a video card effects
the amount of available memory in your PC.
See: http://www.corsair.com/_appnotes/AN804_Gaming_Performance_Analysis.pdf

Intel Chipset 4 GB System Memory Support
http://www.dcomputer.com/ProInfo/support/support/mainboard/4GB_Rev1/4GB_Rev1.pdf

Vista Users with SP1 now report how much physical memory installed on your
computer:
See: Windows Vista SP1 includes reporting of Installed System Memory (RAM):
http://support.microsoft.com/kb/946003

RAM, Virtual Memory, Pagefile and all that stuff:
Basic information about the Virtual Memory implementation
in 32 bit versions of Windows 2000, XP, 2003 Server etc.
http://support.microsoft.com/kb/555223

JS
http://www.pagestart.com
 
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