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Windows XP system does not see all memory.

I have a Dell Dimension XPS 600 running Windows XP Media Center 2005.  It has 4GB of RAM installed.  I thought that Windows XP, all flavors, could recognize up to 4GB of RAM.  Yet when I boot into the OS only 2GB show.  The system recognizes 4GB of RAM on POST.  I have used all the different boot.ini configurations (i.e. /PAE, /3GB, etc.).

If anyone has any idea please contribute, thanks.
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eagle0468
Asked:
eagle0468
1 Solution
 
captainCommented:
Windows will not see all the RAM, You will get between 2.15 and 3Gb of RAM depending on your "Memory Remapping" option in BIOS or whether your MB handles this  automatically. You will need to enable the remapping if you have the option to see more of it than 2.xxGB

If you have SP2 then look at theis KB

http://support.microsoft.com/kb/888137/en-us

hth
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captainCommented:
Here is another article that may help you:
http://www.microsoft.com/whdc/system/platform/server/PAE/PAEdrv.mspx

all the best
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PUNKYCommented:
If the /PAE is not help, then that is all of memory amount that you have. If you want see all or more, use 64 bit OS.
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mailtosinghsCommented:
all these articles will not hhelp if your BIOS is showing this amount of RAM as 'appropriated RAM".
i have faced this issues and configured the system settings all the ways found in different article but unable to recover 860 mb ram. only 3.12 gb of ram was showing up.

You can find number of questions in the EE as well without the solution, only explanation made there.
you will find multiple links back to manufacturer website but will not be able to recover the RAM if you BIOS does not have any option to change reserved ram.
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mailtosinghsCommented:
Even I have installed windows 2003 r2 enterprise 64 bit but it was showing up 3.12 gb ram.
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eagle0468Author Commented:
captainreiss, I'm sorry, but I've actually gone down those paths already.

PUNKY, did you not read the part that stated there is 4GB showing up in the BIOS?  I have 4GB of memory installed, only 2GB shows in the OS.
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captainCommented:
Hi

There is a resource on DELL www, which explains my first post in more detail:
http://support.euro.dell.com/support/topics/topic.aspx/emea/shared/support/dsn/en/document?c=uk&l=en&s=gen&docid=BF4C8393BFC74A83B9EC318630B9CE7D&journalid=60E28EEB452111DCA116617F9FBCF36B&Query=NGdiK21lbW9yeQ==&SystemID=XPS_PNT_P4_DXG&ServiceTag=&contenttype=-1&os=-1&component=-1&lang=-1&doclang=en&toggle=false

You can if you have the option in the BIOS enable remapping, whether or not it is available I cannot say, reclaim some of the RAM but likelyhood is that you won't get more than 3.25Gb in Windows.

As DELL say (and any other manufacturer) this is by design, after all it is limited by the 32bit system so we are all in the same situation, I have 3.18Gb after remapping has been enabled.

all the best
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captainCommented:
thanks, all the best
cr
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