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Memory not reported correctly

By tonyemm ·
I have recently installed 4GB of Memory in my PC running Windows XP Pro and SP2. If I look at the System Properties in Control Panel only 3GB is being reported. Does anyone know why this is and how I can get Windows to show all 4GB?

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by 3xp3rt In reply to Memory not reported corre ...

Can your motherboard support 4 GB of RAM? If the answer is yes, all RAM modules are the same type? I think if this two thinks are OK and still not working, you probably have a bad module.

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by tonyemm In reply to

The Bios is showing all 4GB (4 x 1GB) of memory, all are the same type and speed. Previously all 4GB showed when I was running SP1 and added the /PAE switch to the boot.ini file. After installing SP2 I now have this problem, the /PAE switch does not work.

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by Wild Bill H In reply to Memory not reported corre ...

It could be a hardward issue.This may sound dumb, but I have had these problems also. Once the problem was the system could not handle all the memory I was intstalling. Have you checked the mother board, bios, and pc chip to check compatability and capability.
Another time, I finaly discovered that the memory chip was defective. I was only getting about 70% of the chip to function.
One other time, two memory chips were installed into the slots. Only one was a good chip. Even another time, I had a bad slot.
I would begin my trouble shooting by putting the memory board chip into another pc and see if that pc can report the total amount of memory. Or even try another slot in your pc if you don't have access to another pc. Also can you put another (perhaps borrowed) memory card into your pc and see if your pc reports the total memory from that card? This may help to eliminate a hardware issue.
I know these may sound silly, but I have driven myself crazy, only to find these simple solutions. You would think new means it works.

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by tonyemm In reply to

Please see answer to 3xp3rt.
Thanks.

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by Wild Bill H In reply to Memory not reported corre ...

Well this is a horse of a different color. I did not relize you had a pages pool memory issue with the /PAE switch. I can refer you to the help data base article # 811732, which also tell you about a service pack update. This problem was corrected in SP4.
The site also tells you how to do a untested hotfix.

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by HAL 9000 Moderator In reply to Memory not reported corre ...

Windows XP by default only supports 3 GIG of RAM that is what is happening here and I'm not sure that there is a work around for this problem.

Even if there was like 98 before XP when you altered the registry to accommodate more than the 712 MEG or whatever it was the machine suffered a performance hit and slowed down. I dare say that the same would happen with XP if you altered the Registry Entries to accommodate the greater than max programed RAM.

This is purely a Windows XP issue and nothing else you don't have a hardware issue it's just that you have exceeded the upper limit of Mappable RAM that XP supports.

For a fix you'll have to hunt around on MS knowledge base to see if MS has a listed alteration for greater than 3 GIG Memory Loads.

Col

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by tonyemm In reply to

Thanks for the reply.
Tonyemm

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by jc2it In reply to Memory not reported corre ...

Windows XP PRO actually supports 4GB of RAM.
http://www.support.microsoft.com/default.aspx?scid=kb;en-us;555223&SD=tech

This article explains your problem.
http://support.microsoft.com/?kbid=888855

Following this Article might help fix your problem.
http://support.microsoft.com/?id=888137

This might also:
http://www.microsoft.com/technet/prodtechnol/winxppro/maintain/sp2mempr.mspx

I wonder How much video RAM or Virtual RAM you have? Does this count towards the 4GB RAM limit in SP2?

Hope this helps,
Job Cacka

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by tonyemm In reply to

Many thanks for your help, I have been trawling Knowledge Base, but to no avail. I will certainly read and digest.

Tonyemm

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by tonyemm In reply to Memory not reported corre ...

This question was closed by the author

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