Windows recognizing only half of total RAM on an HP Pavilion laptop

68430 pts.
Tags:
HP Pavilion
RAM
Windows XP
Windows XP Professional
A friend asked me to take a look at his laptop that is running too slow lately.   It is an old HP Pavilion laptop which is supposed to have 512 MB of RAM, but Windows is only seeing 256 MB.   The BIOS is reporting all 512 MB, and a memtest86 test tested 512 MB as well.   Although I appreciate [strong]any[/strong] suggestion, I'm not looking for suggestions on how to speed a low-resource machine up.  I'm just having trouble making Windows recognize the whole RAM, so I am asking for recommendations or opinions regarding that specific problem.   I don't have much information about this machine, so I don't know when or how this started. Event logs don't show anything related to this.   I think that maybe reinstalling/repairing the Windows installation [strong]could[/strong] help, but I would like to avoid doing that unless it is absolutely necessary.   It is an HP Pavilion dv5220LA machine with an AMD turion 64, running Windows XP professional SP2.  It has 128 MB of video memory, and the main memory is not being shared with video.   I have not had the time to open the machine to look at the physical memory modules, but I expect to do that tomorrow night.   Thanks,   CarlosDL

Answer Wiki

Thanks. We'll let you know when a new response is added.

<a href=”http://forums.cnet.com/7723-6142_102-13132.html”>MAXMEM </a>setting?
Also see <a href=”http://support.microsoft.com/kb/108393″>this</a>. Or, <a href=”http://www.mombu.com/microsoft/windows-xp-security-and-administration/t-bootini-maxmem256–956163.html”>this</a>.

Looks like a very obscure setting that some programs may add to your boot string. Since BIOS and memtest86 both see the RAM, I would be surprised if it was in any way defective.

Discuss This Question: 7  Replies

 
There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when members answer or reply to this question.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
  • jinteik
    maybe a suggestion carlos 1.maybe you can switch the ram position 2.take out both the ram and use an erraser and rub the golden finger till it is shining once again like brand new.
    17,370 pointsBadges:
    report
  • Guardian
    All suggestion are correct, also might want to update the BIOS, as it myt be a faulty DIMM - that about to expire. Also might try and remove one module and see if its recognized and do the same for the other module. Then retry using the other memory bank
    900 pointsBadges:
    report
  • carlosdl
    Thanks. No MAXMEM setting. I plan to make some tests removing memory modules tonight.
    68,430 pointsBadges:
    report
  • carlosdl
    Update: The machine has a single 512 MB memory module. I removed it and cleaned it but it didn't help. I moved it to the other slot, with the same results. Will try updating the BIOS tonight.
    68,430 pointsBadges:
    report
  • Rakei
    your memory may not support your Laptop, although it still reads but does not fully supports it potential... Here a link that may help you track down the compatibility memory that support that particular Laptop. http://www.memorystock.com/hp_pavilion_laptop.htm this could also help.. http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1304023060335+28353475&threadId=843758
    3,260 pointsBadges:
    report
  • carlosdl
    Thanks, The memory is fully compatible, I just checked the manual.
    68,430 pointsBadges:
    report
  • carlosdl
    The BIOS update didn't help. A windows repair didn't help either. I ended up formatting the partition and reinstalling Windows and this solved the problem. Thanks for your suggestions.
    68,430 pointsBadges:
    report

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to:

To follow this tag...

There was an error processing your information. Please try again later.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Thanks! We'll email you when relevant content is added and updated.

Following