Maximum Memory

Does anyone know what the maximum memory used in Windows
98 is?

"jgcamp" wrote in message
...
Does anyone know what the maximum memory used in Windows
98 is?

*************
I'm running 1024 MB, no problems, I understand MAX is 1.5 GB, but problems
may occur between those 2 values..........
EdK

Windows 98 was designed to use 2Gb or RAM, but machines with that capacity
were not available when it was being designed. When you get to about 512Mb
you have to make some minor tweaks. At 1Gb some more tweaks may be required,
and some motherboards cannot go above 1Gb. The highest possible seems to be
about 1.5Gb.
http://aumha.org/win4/a/memmgmt.php
--
Jeff Richards
MS MVP (DTS)
"EDK" wrote in message
...

"jgcamp" wrote in message
...
Does anyone know what the maximum memory used in Windows
98 is?

*************
I'm running 1024 MB, no problems, I understand MAX is 1.5 GB, but problems
may occur between those 2 values..........
EdK

I know I am adding my own question to this post but it is a good place for
it. Does the type of Ram have any affect in 98SE --- for example there is
Edo Ram, Sdram, DDR ram, and a friend of mine said DDR 2 ram is starting to
come out. Is Windows 98SE compatibible with all of these different ram
types? Thanks in advance for the help and sorry to the poster if the person
takes offense at me adding on to this post.

"Jeff Richards" wrote in message
...
Windows 98 was designed to use 2Gb or RAM, but machines with that capacity
were not available when it was being designed. When you get to about
512Mb
you have to make some minor tweaks. At 1Gb some more tweaks may be
required,
and some motherboards cannot go above 1Gb. The highest possible seems to
be
about 1.5Gb.
http://aumha.org/win4/a/memmgmt.php
--
Jeff Richards
MS MVP (DTS)
"EDK" wrote in message
...

"jgcamp" wrote in message
...
Does anyone know what the maximum memory used in Windows
98 is?

*************
I'm running 1024 MB, no problems, I understand MAX is 1.5 GB, but
problems
may occur between those 2 values..........
EdK

"ArtWilder" wrote in message
...
I know I am adding my own question to this post but it is a good place for
it. Does the type of Ram have any affect in 98SE --- for example there is
Edo Ram, Sdram, DDR ram, and a friend of mine said DDR 2 ram is starting
to
come out. Is Windows 98SE compatibible with all of these different ram
types? Thanks in advance for the help and sorry to the poster if the
person
takes offense at me adding on to this post.

"Jeff Richards" wrote in message
...
Windows 98 was designed to use 2Gb or RAM, but machines with that
capacity
were not available when it was being designed. When you get to about
512Mb
you have to make some minor tweaks. At 1Gb some more tweaks may be
required,
and some motherboards cannot go above 1Gb. The highest possible seems
to
be
about 1.5Gb.
http://aumha.org/win4/a/memmgmt.php
--
Jeff Richards
MS MVP (DTS)
"EDK" wrote in message
...

"jgcamp" wrote in message
...
Does anyone know what the maximum memory used in Windows
98 is?

*************
I'm running 1024 MB, no problems, I understand MAX is 1.5 GB, but
problems
may occur between those 2 values..........
EdK


*********************
To clarify.......1024 DDR2700 (333) DRam
EdK

Thanks, then I guess all modern ram types are supported. : I appreciate
the response.

"EDK" wrote in message
...

"ArtWilder" wrote in message
...
I know I am adding my own question to this post but it is a good place
for
it. Does the type of Ram have any affect in 98SE --- for example there
is
Edo Ram, Sdram, DDR ram, and a friend of mine said DDR 2 ram is starting
to
come out. Is Windows 98SE compatibible with all of these different ram
types? Thanks in advance for the help and sorry to the poster if the
person
takes offense at me adding on to this post.

"Jeff Richards" wrote in message
...
Windows 98 was designed to use 2Gb or RAM, but machines with that
capacity
were not available when it was being designed. When you get to about
512Mb
you have to make some minor tweaks. At 1Gb some more tweaks may be
required,
and some motherboards cannot go above 1Gb. The highest possible seems
to
be
about 1.5Gb.
http://aumha.org/win4/a/memmgmt.php
--
Jeff Richards
MS MVP (DTS)
"EDK" wrote in message
...

"jgcamp" wrote in message
...
Does anyone know what the maximum memory used in Windows
98 is?

*************
I'm running 1024 MB, no problems, I understand MAX is 1.5 GB, but
problems
may occur between those 2 values..........
EdK


*********************
To clarify.......1024 DDR2700 (333) DRam
EdK

Windows is completely indifferent to the type of RAM used. The motherboard
is very sensitive to the type of RAM used, and only the correct type will
work. If it's OK for the motherboard it's OK for Windows.

With apologies to EDK for tacking my response to his post instead of OP.
--
Jeff Richards
MS MVP (DTS)
"ArtWilder" wrote in message
...
Thanks, then I guess all modern ram types are supported. : I appreciate
the response.

To add to the question, how much physical (real) memory AND hard
disk/swapfile (virtual memory) can be utilized total in the real world? No
theoretical stuff.

Users of A/V translation to another file format etc. can easily appreciate
the question. Example: 2GB avi to mpeg2 format.
"Jeff Richards" wrote in message
...
Windows 98 was designed to use 2Gb or RAM, but machines with that capacity
were not available when it was being designed. When you get to about
512Mb
you have to make some minor tweaks. At 1Gb some more tweaks may be
required,
and some motherboards cannot go above 1Gb. The highest possible seems to
be
about 1.5Gb.
http://aumha.org/win4/a/memmgmt.php
--
Jeff Richards
MS MVP (DTS)
"EDK" wrote in message
...

"jgcamp" wrote in message
...
Does anyone know what the maximum memory used in Windows
98 is?

*************
I'm running 1024 MB, no problems, I understand MAX is 1.5 GB, but
problems
may occur between those 2 values..........
EdK

First define your "real world" ;-)

You can address a linear 32-bits (4GB) on a 32-bit processor without
any segmentation. Some IA-32 processors support addressing
up to 64GB, by using segmenting (similar, I'd guess to 16-bit real-mode
segmentation that extended 64K addressing to 1MB).

AFA Windows 9x is concerned, dunno really.. I thought the 9x architecture
was designed to use the flat addressing model (4GB), though that wasn't
really available to debug at the time, as Jeff points out. NT, dunno..Some of
the server OSs can utilize more.

http://support.microsoft.com/?id=274750



"Lil' Dave" wrote in message ...
To add to the question, how much physical (real) memory AND hard
disk/swapfile (virtual memory) can be utilized total in the real world? No
theoretical stuff.

Users of A/V translation to another file format etc. can easily appreciate
the question. Example: 2GB avi to mpeg2 format.
"Jeff Richards" wrote in message
...
Windows 98 was designed to use 2Gb or RAM, but machines with that capacity
were not available when it was being designed. When you get to about
512Mb
you have to make some minor tweaks. At 1Gb some more tweaks may be
required,
and some motherboards cannot go above 1Gb. The highest possible seems to
be
about 1.5Gb.
http://aumha.org/win4/a/memmgmt.php
--
Jeff Richards
MS MVP (DTS)
"EDK" wrote in message
...

"jgcamp" wrote in message
...
Does anyone know what the maximum memory used in Windows
98 is?

*************
I'm running 1024 MB, no problems, I understand MAX is 1.5 GB, but
problems
may occur between those 2 values..........
EdK

Some operating systems implement virtual memory management using a scheme
where any number of processes can be swapped through a particular area of
RAM. In those cases RAM + swap is effectively unlimited, or at least it's
limited by the number of processes the OS can manage. Because Windows 9x
relies on the X86 virtual memory management scheme each process requires a
unique virtual address, so RAM + swap is limited to the maximum virtual
address that Windows can allocate. Application programs are limited to 2Gb
of virtual address space - the rest is allocated to the OS. So my estimate
for the maximum RAM + swap is 2GB plus whatever the OS requires. We already
know that this can't be all RAM, and obviously it can't be all swap, and
it's possible the total varies according to how much RAM is installed. Your
suggestion for testing is probably not effective, since there's no need for
either file to be entirely in memory. MS does supply test programs that do
nothing other than consume memory, but I haven't seen any results for the
sort of testing your mention.
--
Jeff Richards
MS MVP (DTS)
"Lil' Dave" wrote in message
...
To add to the question, how much physical (real) memory AND hard
disk/swapfile (virtual memory) can be utilized total in the real world?
No
theoretical stuff.

Users of A/V translation to another file format etc. can easily appreciate
the question. Example: 2GB avi to mpeg2 format.