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Looking for some help. We have a computer running Windows XP Pro 64bit SP2 (supported till April lol). It is dealing with lots of video feeds in our organisation and it only had 4gig of ram. So in my greatest wisdom I decided to upgrade the ram. Used the same speed ram and added an additional 4 gig of ram. The bios sees the ram and using crucial memory checker that also sees the ram however the XP pro 64bit will only recognise 4 gig (3.75gb available). Looked for a memory remapping section in the bios but there is no option.....

Any help or suggestions how to fix the issue would be great.

Edit : As requested :

BootDevice=\Device\HarddiskVolume1
BuildNumber=3790
BuildType=Multiprocessor Free
Caption=Microsoft(R) Windows(R) XP Professional x64 Edition
CodeSet=1252
CountryCode=44
CreationClassName=Win32_OperatingSystem
CSCreationClassName=Win32_ComputerSystem
CSDVersion=Service Pack 2
CSName=NVR-3
CurrentTimeZone=0
DataExecutionPrevention_32BitApplications=TRUE
DataExecutionPrevention_Available=TRUE
DataExecutionPrevention_Drivers=TRUE
DataExecutionPrevention_SupportPolicy=2
Debug=FALSE
Description=
Distributed=FALSE
EncryptionLevel=168
ForegroundApplicationBoost=2
FreePhysicalMemory=1977284
FreeSpaceInPagingFiles=2073752
FreeVirtualMemory=3904920
InstallDate=20120125143336.000000+000
LargeSystemCache=0
LastBootUpTime=20140324115010.265625+000
LocalDateTime=20140326094246.578000+000
Locale=0809
Manufacturer=Microsoft Corporation
MaxNumberOfProcesses=-1
MaxProcessMemorySize=8589934464
Name=Microsoft Windows XP Professional x64 Edition|C:\WINDOWS|\Device\Harddisk0\
Partition1
NumberOfLicensedUsers=
NumberOfProcesses=70
NumberOfUsers=3
Organization=:)
OSLanguage=1033
OSProductSuite=256
OSType=18
OtherTypeDescription=
PAEEnabled=
PlusProductID=
PlusVersionNumber=
Primary=TRUE
ProductType=1
QuantumLength=0
QuantumType=0
RegisteredUser=  :)
SerialNumber=   :)
ServicePackMajorVersion=2
ServicePackMinorVersion=0
SizeStoredInPagingFiles=2095104
Status=OK
SuiteMask=272
SystemDevice=\Device\HarddiskVolume1
SystemDirectory=C:\WINDOWS\system32
SystemDrive=C:
TotalSwapSpaceSize=
TotalVirtualMemorySize=5313860
TotalVisibleMemorySize=3536904
Version=5.2.3790
WindowsDirectory=C:\WINDOWS
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2  
Are you positive that it is XP x64? –  MDMarra Mar 25 at 10:05
    
100%! Windows XP Pro 64bit SP2. I know that 32bit windows can only cope with a maximum of 4gib unless you use the /PAE or whatever the boot.ini switch is. That's why I'm stumped on this issue. –  Xeo Mar 25 at 10:06
1  
If memory serves XP64, SP2 uses the 64-bit Win2003 core and has the same support schedule. (Until middle of 2015 if I'm correctly informed.) Over 4 GB should work. I have one sitting around the corner that has 12 GB of RAM. Are you REALLY sure it is 64 bit ? –  Tonny Mar 25 at 10:31
3  
Any help or suggestions how to fix the issue would be great. Switch to a modern OS. I know it's not always an option, and have been tasked with creating a new Server 2003 OS myself recently, but the far easier, better solution is to just move to a modern OS - Server 2008 R2/W7+. –  HopelessN00b Mar 25 at 11:34
    
Its definitely 64bit. Would you like a screen shot? problem is I have 3 of these boxes serving about 100 odd video feeds. Not quite as simple to move OS. –  Xeo Mar 25 at 14:02

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