Bizarre RAM read

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Hi

Just upgraded a PII 400mhz Quantex computer with 3 X 128mb PC100 SDRAM. The
computer is reading 192Mb????

The computer runs Win 98. The SDRAM modules have been changed around and
generate the same result. They seem to be correctly installed. None of the
modules seem to be overheating and the CMOS recognised that it has 3 slots
available to RAM chips.

Does anyone have any ideas as to why the system isn't using all the
available RAM?

Cheers
Gavin
9 answers Last reply
More about bizarre read
  1. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    Gavin wrote:

    > Hi
    >
    > Just upgraded a PII 400mhz Quantex computer with 3 X 128mb PC100 SDRAM. The
    > computer is reading 192Mb????
    >
    > The computer runs Win 98. The SDRAM modules have been changed around and
    > generate the same result. They seem to be correctly installed. None of the
    > modules seem to be overheating and the CMOS recognised that it has 3 slots
    > available to RAM chips.
    >
    > Does anyone have any ideas as to why the system isn't using all the
    > available RAM?

    Well, 192 is 3 x 64 Meg so it looks like it's only seeing half of each
    memory module. And since you say you just upgraded to it I'd bet you've got
    'high density' 128 Meg RAM modules that are incompatible with the motherboard.

    If the memory says it's using 16x16 chips then it's 'high density'. Your
    board needs modules using 16x8 chips.
  2. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    Gavin wrote:
    > Hi
    >
    > Just upgraded a PII 400mhz Quantex computer with 3 X 128mb PC100 SDRAM. The
    > computer is reading 192Mb????
    >
    > The computer runs Win 98. The SDRAM modules have been changed around and
    > generate the same result. They seem to be correctly installed. None of the
    > modules seem to be overheating and the CMOS recognised that it has 3 slots
    > available to RAM chips.
    >
    > Does anyone have any ideas as to why the system isn't using all the
    > available RAM?
    >
    > Cheers
    > Gavin
    >
    >
    >

    What is the make and model of the mainboard? Perhaps the maximum it can
    take is 192mb. Or perhaps it can only have two slots filled with cards
    of 128mb. I wonder if at least one of those cards is high density sdram
    and the motherboard is supposed to use low density, so it's only
    addressing half of one of the cards.

    Cheers,

    Ari


    --
    spammage trappage: replace fishies_ with yahoo

    I'm going to die rather sooner than I'd like. I tried to protect my
    neighbours from crime, and became the victim of it. To jump to the end
    of the story, as a result of this I need a bone marrow transplant. Many
    people around the world are waiting for a marrow transplant, too. Please
    volunteer to be a marrow donor:
    http://www.abmdr.org.au/
    http://www.marrow.org/
  3. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
    news:41ee6e48$1@quokka.wn.com.au...
    > Gavin wrote:
    >> Hi
    >>
    >> Just upgraded a PII 400mhz Quantex computer with 3 X 128mb PC100 SDRAM.
    >> The
    >> computer is reading 192Mb????
    >>
    >> The computer runs Win 98. The SDRAM modules have been changed around and
    >> generate the same result. They seem to be correctly installed. None of
    >> the
    >> modules seem to be overheating and the CMOS recognised that it has 3
    >> slots
    >> available to RAM chips.
    >>
    >> Does anyone have any ideas as to why the system isn't using all the
    >> available RAM?
    >>
    >> Cheers
    >> Gavin
    >>
    >>
    >>
    >
    > What is the make and model of the mainboard? Perhaps the maximum it can
    > take is 192mb. Or perhaps it can only have two slots filled with cards of
    > 128mb. I wonder if at least one of those cards is high density sdram and
    > the motherboard is supposed to use low density, so it's only addressing
    > half of one of the cards.
    >
    > Cheers,
    >
    > Ari
    >
    And..
    Has the mobo got onboard video, which is using up some memory?

    SteveH
  4. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    Thanks for your responses.

    Is there any way to find out what density of module the board supports? In
    fact from the marking on the modules I am still none the wiser as to whether
    they are 'high' or 'low' density modules.

    Cheers
    Gavin

    ">
    > Well, 192 is 3 x 64 Meg so it looks like it's only seeing half of each
    > memory module. And since you say you just upgraded to it I'd bet you've
    got
    > 'high density' 128 Meg RAM modules that are incompatible with the
    motherboard.
    >
    > If the memory says it's using 16x16 chips then it's 'high density'. Your
    > board needs modules using 16x8 chips.
    >
  5. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    Gavin wrote:
    > Thanks for your responses.
    >
    > Is there any way to find out what density of module the board supports?

    Yes, that's why I asked for the manufacturer and model of the board!

    > In
    > fact from the marking on the modules I am still none the wiser as to whether
    > they are 'high' or 'low' density modules.
    >
    > Cheers
    > Gavin
    >
    > ">
    >
    >>Well, 192 is 3 x 64 Meg so it looks like it's only seeing half of each
    >>memory module. And since you say you just upgraded to it I'd bet you've
    >
    > got
    >
    >>'high density' 128 Meg RAM modules that are incompatible with the
    >
    > motherboard.
    >
    >>If the memory says it's using 16x16 chips then it's 'high density'. Your
    >>board needs modules using 16x8 chips.
    >>
    >
    >
    >


    --
    spammage trappage: replace fishies_ with yahoo

    I'm going to die rather sooner than I'd like. I tried to protect my
    neighbours from crime, and became the victim of it. To jump to the end
    of the story, as a result of this I need a bone marrow transplant. Many
    people around the world are waiting for a marrow transplant, too. Please
    volunteer to be a marrow donor:
    http://www.abmdr.org.au/
    http://www.marrow.org/
  6. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    I don't know the name or make of motherboard. Is there a utility available
    that can be run on the computer to establish this information?


    "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
    news:41ef452d$1@quokka.wn.com.au...
    > Gavin wrote:
    > > Thanks for your responses.
    > >
    > > Is there any way to find out what density of module the board supports?
    >
    > Yes, that's why I asked for the manufacturer and model of the board!
    >
    > > In
    > > fact from the marking on the modules I am still none the wiser as to
    whether
    > > they are 'high' or 'low' density modules.
    > >
    > > Cheers
    > > Gavin
    > >
    > > ">
    > >
    > >>Well, 192 is 3 x 64 Meg so it looks like it's only seeing half of each
    > >>memory module. And since you say you just upgraded to it I'd bet you've
    > >
    > > got
    > >
    > >>'high density' 128 Meg RAM modules that are incompatible with the
    > >
    > > motherboard.
    > >
    > >>If the memory says it's using 16x16 chips then it's 'high density'. Your
    > >>board needs modules using 16x8 chips.
    > >>
    > >
    > >
    > >
    >
    >
    > --
    > spammage trappage: replace fishies_ with yahoo
    >
    > I'm going to die rather sooner than I'd like. I tried to protect my
    > neighbours from crime, and became the victim of it. To jump to the end
    > of the story, as a result of this I need a bone marrow transplant. Many
    > people around the world are waiting for a marrow transplant, too. Please
    > volunteer to be a marrow donor:
    > http://www.abmdr.org.au/
    > http://www.marrow.org/
  7. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    Gavin wrote:
    > I don't know the name or make of motherboard. Is there a utility available
    > that can be run on the computer to establish this information?
    >
    >

    A screwdriver and a flashlight?

    > "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
    > news:41ef452d$1@quokka.wn.com.au...
    >
    >>Gavin wrote:
    >>
    >>>Thanks for your responses.
    >>>
    >>>Is there any way to find out what density of module the board supports?
    >>
    >>Yes, that's why I asked for the manufacturer and model of the board!
    >>
    >>
    >>>In
    >>>fact from the marking on the modules I am still none the wiser as to
    >
    > whether
    >
    >>>they are 'high' or 'low' density modules.
    >>>
    >>>Cheers
    >>>Gavin
    >>>
    >>>">
    >>>
    >>>>Well, 192 is 3 x 64 Meg so it looks like it's only seeing half of each
    >>>>memory module. And since you say you just upgraded to it I'd bet you've
    >>>
    >>>got
    >>>
    >>>
    >>>>'high density' 128 Meg RAM modules that are incompatible with the
    >>>
    >>>motherboard.
    >>>
    >>>
    >>>>If the memory says it's using 16x16 chips then it's 'high density'. Your
    >>>>board needs modules using 16x8 chips.
    >>>>
    >>>
    >>>
    >>>
    >>
    >>--
    >>spammage trappage: replace fishies_ with yahoo
    >>
    >>I'm going to die rather sooner than I'd like. I tried to protect my
    >>neighbours from crime, and became the victim of it. To jump to the end
    >>of the story, as a result of this I need a bone marrow transplant. Many
    >>people around the world are waiting for a marrow transplant, too. Please
    >>volunteer to be a marrow donor:
    >>http://www.abmdr.org.au/
    >>http://www.marrow.org/
    >
    >
    >


    --
    spammage trappage: replace fishies_ with yahoo

    I'm going to die rather sooner than I'd like. I tried to protect my
    neighbours from crime, and became the victim of it. To jump to the end
    of the story, as a result of this I need a bone marrow transplant. Many
    people around the world are waiting for a marrow transplant, too. Please
    volunteer to be a marrow donor:
    http://www.abmdr.org.au/
    http://www.marrow.org/
  8. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    Spodosaurus

    Ok, got the screwdriver and torch out.

    The motherboard is a Biostar M6TBA version 1.2

    Would be grateful if you would let me know which RAM is compatible. What
    maximum size of modules, how many, what density, ECC or non-ECC - plus
    anything else you think i should know.

    Thanks in advance.
    Gavin


    "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
    news:41efa45d$1@quokka.wn.com.au...
    > Gavin wrote:
    > > I don't know the name or make of motherboard. Is there a utility
    available
    > > that can be run on the computer to establish this information?
    > >
    > >
    >
    > A screwdriver and a flashlight?
    >
    > > "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
    > > news:41ef452d$1@quokka.wn.com.au...
    > >
    > >>Gavin wrote:
    > >>
    > >>>Thanks for your responses.
    > >>>
    > >>>Is there any way to find out what density of module the board supports?
    > >>
    > >>Yes, that's why I asked for the manufacturer and model of the board!
    > >>
    > >>
    > >>>In
    > >>>fact from the marking on the modules I am still none the wiser as to
    > >
    > > whether
    > >
    > >>>they are 'high' or 'low' density modules.
    > >>>
    > >>>Cheers
    > >>>Gavin
    > >>>
    > >>>">
    > >>>
    > >>>>Well, 192 is 3 x 64 Meg so it looks like it's only seeing half of each
    > >>>>memory module. And since you say you just upgraded to it I'd bet
    you've
    > >>>
    > >>>got
    > >>>
    > >>>
    > >>>>'high density' 128 Meg RAM modules that are incompatible with the
    > >>>
    > >>>motherboard.
    > >>>
    > >>>
    > >>>>If the memory says it's using 16x16 chips then it's 'high density'.
    Your
    > >>>>board needs modules using 16x8 chips.
    > >>>>
    > >>>
    > >>>
    > >>>
    > >>
    > >>--
    > >>spammage trappage: replace fishies_ with yahoo
    > >>
    > >>I'm going to die rather sooner than I'd like. I tried to protect my
    > >>neighbours from crime, and became the victim of it. To jump to the end
    > >>of the story, as a result of this I need a bone marrow transplant. Many
    > >>people around the world are waiting for a marrow transplant, too. Please
    > >>volunteer to be a marrow donor:
    > >>http://www.abmdr.org.au/
    > >>http://www.marrow.org/
    > >
    > >
    > >
    >
    >
    > --
    > spammage trappage: replace fishies_ with yahoo
    >
    > I'm going to die rather sooner than I'd like. I tried to protect my
    > neighbours from crime, and became the victim of it. To jump to the end
    > of the story, as a result of this I need a bone marrow transplant. Many
    > people around the world are waiting for a marrow transplant, too. Please
    > volunteer to be a marrow donor:
    > http://www.abmdr.org.au/
    > http://www.marrow.org/
  9. Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

    Gavin wrote:

    > Spodosaurus
    >
    > Ok, got the screwdriver and torch out.
    >
    > The motherboard is a Biostar M6TBA version 1.2
    >
    > Would be grateful if you would let me know which RAM is compatible. What
    > maximum size of modules, how many, what density, ECC or non-ECC - plus
    > anything else you think i should know.

    That's a 440BX chipset.

    Non-ECC, up to 256 Meg per module, but with 16x8 memory chips. I.E. 'low
    density'.

    When looking at an online memory supplier, either use their memory selector
    or memory that says it's compatible with 'everything'. It'll be the more
    expensive version.

    For example, this supplier has 'el-cheapo' SDRAM and the 'better' SDRAM
    listed side by side.

    http://www.buyaib.com/index.asp?PageAction=VIEWPROD&ProdID=862

    The one on the left is the cheaper version and note:

    "DRAM Type High Density OEM

    Only works on VIA® KLE133 VT8361A Chipset that support High Density Memory
    Only. Will not work with Biostar / Asus / Intel Motherboard or Compaq /
    Dell / Gateway system"

    Discount houses always lead off their ads with these mostly incompatible,
    but attractively cheap, SDRAM modules.

    What you need is one of the other two listed as

    "Industry Standard
    Low Density 16x8 DRAM

    Compatibility Guaranteed

    Compatible with most Motherboard or Computer System"

    You still have to be careful with the "Industry Standard" moniker as some
    say that for modules that are not true low density. Look for a
    'compatibility' guarantee (and the 16x8 memory chip specification).


    > Thanks in advance.
    > Gavin
    >
    >
    >
    >
    > "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
    > news:41efa45d$1@quokka.wn.com.au...
    >
    >>Gavin wrote:
    >>
    >>>I don't know the name or make of motherboard. Is there a utility
    >
    > available
    >
    >>>that can be run on the computer to establish this information?
    >>>
    >>>
    >>
    >>A screwdriver and a flashlight?
    >>
    >>
    >>>"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
    >>>news:41ef452d$1@quokka.wn.com.au...
    >>>
    >>>
    >>>>Gavin wrote:
    >>>>
    >>>>
    >>>>>Thanks for your responses.
    >>>>>
    >>>>>Is there any way to find out what density of module the board supports?
    >>>>
    >>>>Yes, that's why I asked for the manufacturer and model of the board!
    >>>>
    >>>>
    >>>>
    >>>>>In
    >>>>>fact from the marking on the modules I am still none the wiser as to
    >>>
    >>>whether
    >>>
    >>>
    >>>>>they are 'high' or 'low' density modules.
    >>>>>
    >>>>>Cheers
    >>>>>Gavin
    >>>>>
    >>>>>">
    >>>>>
    >>>>>>Well, 192 is 3 x 64 Meg so it looks like it's only seeing half of each
    >>>>>>memory module. And since you say you just upgraded to it I'd bet
    >
    > you've
    >
    >>>>>got
    >>>>>
    >>>>>
    >>>>>
    >>>>>>'high density' 128 Meg RAM modules that are incompatible with the
    >>>>>
    >>>>>motherboard.
    >>>>>
    >>>>>
    >>>>>
    >>>>>>If the memory says it's using 16x16 chips then it's 'high density'.
    >
    > Your
    >
    >>>>>>board needs modules using 16x8 chips.
    >>>>>>
    >>>>>
    >>>>>
    >>>>>
    >>>>--
    >>>>spammage trappage: replace fishies_ with yahoo
    >>>>
    >>>>I'm going to die rather sooner than I'd like. I tried to protect my
    >>>>neighbours from crime, and became the victim of it. To jump to the end
    >>>>of the story, as a result of this I need a bone marrow transplant. Many
    >>>>people around the world are waiting for a marrow transplant, too. Please
    >>>>volunteer to be a marrow donor:
    >>>>http://www.abmdr.org.au/
    >>>>http://www.marrow.org/
    >>>
    >>>
    >>>
    >>
    >>--
    >>spammage trappage: replace fishies_ with yahoo
    >>
    >>I'm going to die rather sooner than I'd like. I tried to protect my
    >>neighbours from crime, and became the victim of it. To jump to the end
    >>of the story, as a result of this I need a bone marrow transplant. Many
    >>people around the world are waiting for a marrow transplant, too. Please
    >>volunteer to be a marrow donor:
    >>http://www.abmdr.org.au/
    >>http://www.marrow.org/
    >
    >
    >
Ask a new question

Read More

Homebuilt SDRAM RAM Computer Systems