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  • #2296863

    Memory upgrade not recognized

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    by ian boothby ·

    I’m baffled about an upgrade I’m doing.

    The PC is a custom built Celeron P400 with a LEGEND.QDI BrillianX-1S/2K mobo (FSB 67mhz). It had 64mb PC100 in it which was being correctly reported.

    I put 512mb of Crucial PC133 in its place, i.e. DIMM0, but it only reported 256mb. I then removed it and put 512Mb of Kingston PC133 in, but it then only reported 128mb. In either case, if I added the original 64mb PC100, it correctly adds it.

    What am I doing wrong? Can I NOT put PC133 onto this mobo-I thought it was all backward-compatible??? Do I need to change settings in the Award 4.51 BIOS?

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    • #2684826

      Reply To: Memory upgrade not recognized

      by kc 1 ·

      In reply to Memory upgrade not recognized

      you just hit the nail on the head go into your bios and make sure it recognizezs the memory then you always double check it in the control panel

    • #2684816

      Reply To: Memory upgrade not recognized

      by mdbrewer ·

      In reply to Memory upgrade not recognized

      Try upgrading your bios to the most current revision. Some Motherboards, older ones in particular, can’t see that much memory in each slot. If no update exists, try 2- 256Mb, one in each slot.
      -Matt

      • #2671627

        Reply To: Memory upgrade not recognized

        by ian boothby ·

        In reply to Reply To: Memory upgrade not recognized

        Don’t like doing that, cos once lost a mobo cos flash failed halfway through!

        Will try 2×256 if i can get sone. Thanks

    • #2684790

      Reply To: Memory upgrade not recognized

      by joenmr ·

      In reply to Memory upgrade not recognized

      In addition to the answers given, disable the Quick Boot option in the BIOS. If it is enable the BIOS will not test the new RAM duirng the POST. It should present a checksum error duirng the POST.

    • #2684677

      Reply To: Memory upgrade not recognized

      by thechas ·

      In reply to Memory upgrade not recognized

      PC 133 SDRAM is backwards compatible for access speed.

      What you have is one of 2 problems caused by the dynamic nature of the SDRAM specification.

      The first is that your motherboard likely is limited to 256MB per DIMM.

      Next, many older motherboards can only see half of the newest high density DIMMs.

      As a side comment, if you are running Windows 95, 98 or Me, you do NOT want to have more than 511MB of RAM.
      There is a bug in the core Windows 9X code that can cause a number of strange problems if you have more than 511MB of RAM.
      I limit ALL of my 9X systems to 384MB of RAM.

      Chas

      • #2671519

        Reply To: Memory upgrade not recognized

        by ian boothby ·

        In reply to Reply To: Memory upgrade not recognized

        You’re right – will only take 256 per slot per mobo manual.

        Still doesn’t explain why it sees differing amounts on different makes.

    • #2673121

      Reply To: Memory upgrade not recognized

      by bokesmole ·

      In reply to Memory upgrade not recognized

      I’ve had this issue before with a friends Celeron 700 when he tried to install PC133. It would only recognize the original 64 and an additional 64 from the 512 stick. Had him get PC100 and no problems since.

      • #2671520

        Reply To: Memory upgrade not recognized

        by ian boothby ·

        In reply to Reply To: Memory upgrade not recognized

        I went out & bought 256mb PC100 but still same – only reprts 128mb (plus the 64mb if I put that in slot 2!!)

        I now have more memory than eBuyer!!

    • #2673017

      Reply To: Memory upgrade not recognized

      by saihib ·

      In reply to Memory upgrade not recognized

      According to the manual, and you can get it here:
      http://www.qdi.nl/download/BX1S2000.htm,
      your board has 3 memory slots and supports a total of 768MB of memory. That means each slot can handle a chip no bigger than 256MB. Looks like you wasted your money because you failed to do your homework.

    • #2671354

      Reply To: Memory upgrade not recognized

      by thechas ·

      In reply to Memory upgrade not recognized

      I suspect that the Kingston DIMM uses either double or quad density RAM chips.

      The BIOS on your motherboard can only access single or double density DIMMs.

      So in addition to the limit of the maximum amount of RAM that each slot can handle, you have a limit as to what SDRAM technology your motherboard can properly address.

      Chas

      • #2671318

        Reply To: Memory upgrade not recognized

        by ian boothby ·

        In reply to Reply To: Memory upgrade not recognized

        As this seems to be the only plausible solution offered yet, I hereby award you the points! Maybe I should look out for 256mb PC100 with sgl density DIMMs to see if that is reported correctly!

        Cheers & Merry Christmas to you all!

    • #2671317

      Reply To: Memory upgrade not recognized

      by ian boothby ·

      In reply to Memory upgrade not recognized

      This question was closed by the author

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