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New RAM stick not recognised by Windows..

Posted on 2011-03-19
Last Modified: 2012-05-11
Friend has an old HP PC running XP Pro SP3 - he added a 1GB RAM module to go with the 1GB stick already there.. same spec but not matched....

BIOS recognises it but Windows doesn't - any ideas please?
Question by:chrisfixit
  • 2
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  • +5
LVL 11

Expert Comment

ID: 35171675

Try relocating the RAM in another slot on the system board.  also double check to see if the computer is up to date from Microsoft updates.
LVL 11

Expert Comment

ID: 35171687
Try running this tool from Crucial Memory Experts.  http://www.crucial.com/
LVL 32

Expert Comment

ID: 35171924
What are the specs for the existing AND the new memory?
What system make/model are you working with?
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Accepted Solution

Tekyguy earned 100 total points
ID: 35171945
What model HP is it?  Check for bios update from HP support site.  The newer ram may not be compatible with the older bios - but fixed in a newer update.  

Also, have you tried booting with just the one newer stick of RAM in the system?
LVL 14

Assisted Solution

by:Don Thomson
Don Thomson earned 100 total points
ID: 35172138
Some of the older PCs may only recognize 1Gig - It may have more slots available - but the total the bios will see is 1 gig -  Tekyguy is right though - check and see if HP released a newer bios that may change that - DO NOT update the bios without reading all the release notes about the various bios updates and what they do - If increasing the amount of recognized memory is not one of the update features - don't bother - There are thousands of old PC in the recycle centre that didn't like the bios update someone did  - It's doesn't alway work
LVL 62

Assisted Solution

by:☠ MASQ ☠
☠ MASQ ☠ earned 100 total points
ID: 35172728
If your BIOS detects the RAM and Windows doesn't perhaps you have an environment setting in Windows preventing the extra GB being detected.
eg: http://support.microsoft.com/kb/108393
LVL 92

Assisted Solution

nobus earned 100 total points
ID: 35174689
are you sure both sticks work at the same voltage?  
you can also run memtest, to verify if that sees it, and tests out correct - it can just be bad :  www.memtest.org
or find it on the ubcd : http://www.ultimatebootcd.com/      
LVL 30

Assisted Solution

ded9 earned 100 total points
ID: 35174921
I would recommend  reinstalling windows XP if the ram is getting detected in bios.

Try it


LVL 92

Expert Comment

ID: 35175105
i would like to know what was the outcome/solution

Author Comment

ID: 35175191
Ah, well I passed on all the information that you all contributed, thanks, and he is going to buy another similar stick to the one he bought and try that.
LVL 62

Expert Comment

by:☠ MASQ ☠
ID: 35175226
So should this be reopened & we wait to hear what fixes it before points are distributed?

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