How possible to use all of my 4GB RAM in windows xp SP2?

  • Thread starter Thread starter cg virgo
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cg virgo

hi
i know that it's really repettitive,but i didn't found my answer!
this is my system information:
athlon 64 X2 5200+ - nvidia 7950 GT - 4GB DDRII FSB800

in system bios it shows that i have 4GB of RAM , but in windows XP when i
right click o my computer it shows 3GB of RAM!(in system information shows
4096mb of ram and in DirectX diagnostic it shows 3072mb of RAM!)
and in a program like 3ds max it don't uses more than 3072mb of RAM(it only
knows this amount of RAm!)...
how is it possible to correct this problem?
i need really my 4GB of RAM for rendering in max!
do it corrects if i update my motherboard bios?
....
help?
please...
 
I too have 4gb. XPO will not use more than 3 & a bit, I am led to believe -
BUT - I am also led to believe that the leftover is used for graphics
processing.

JP
 
cg said:
hi
i know that it's really repettitive,but i didn't found my answer!
this is my system information:
athlon 64 X2 5200+ - nvidia 7950 GT - 4GB DDRII FSB800

in system bios it shows that i have 4GB of RAM , but in windows XP when i
right click o my computer it shows 3GB of RAM!(in system information shows
4096mb of ram and in DirectX diagnostic it shows 3072mb of RAM!)
and in a program like 3ds max it don't uses more than 3072mb of RAM(it only
knows this amount of RAm!)...
how is it possible to correct this problem?
i need really my 4GB of RAM for rendering in max!
do it corrects if i update my motherboard bios?
...
help?
please...
Click to expand...

You can't. 32-bit versions of Windows have a 4GB address space, but some
of that address space is used to address I/O stuff, such as VGA RAM; the
remaining portion of address space -- in the vicinity of 3.2 GBs -- is used
to address RAM. The last bit of RAM is wasted, and tinkering with the
BIOS won't help.

If you need the whole 4GB or more, then you need a 64-bit flavor of
Windows, or a different OS.
 
Bob said:
You can't. 32-bit versions of Windows have a 4GB address space, but some
of that address space is used to address I/O stuff, such as VGA RAM; the
remaining portion of address space -- in the vicinity of 3.2 GBs -- is used
to address RAM. The last bit of RAM is wasted, and tinkering with the
BIOS won't help.

If you need the whole 4GB or more, then you need a 64-bit flavor of
Windows, or a different OS.
Click to expand...

Keep in mind that if your system has a 32-bit memory bus then a 64-bit
os will not help.

P.S. - It is possible to have a 32-bit memory bus and a 64-bit
processor. Ram allocations are limited to the memory bus width.

--
Robert Pendell
(e-mail address removed)

"A perfect world is one of chaos."

Thawte Web of Trust Notary
CAcert Assurer
 
thanks every one!
how i can understand that my RAM is 32bit or 64bit?
so updating the bios will not help?
well perhaps i go and install 64bit XP?
what about linux?
do it occuer any problem with XP if i installit?
thanks.
 
cg said:
thanks every one!
how i can understand that my RAM is 32bit or 64bit?
so updating the bios will not help?
well perhaps i go and install 64bit XP?
what about linux?
do it occuer any problem with XP if i installit?
thanks.
Click to expand...

The Athlon64 is a 64 bit processor, capable of operating in
32 bit legacy mode (for use with WinXP 32 bit version). It
can also operate in a 64 bit OS and run 32 bit applications
in that environment. And also run 64 bit native applications,
in the 64 bit OS. (I think there are a couple Semprons that
are not 64 bit, but the rest of the processors are capable.)

If you check your motherboard manual, there may be mention of
an 8GB maximum memory population, which should tell you that
the hardware supports >32bit addressing through to the memory
subsystem. Check the BIOS setting for a memory remapping function.
That allows remapping memory, so it can all be seen by a 64 bit OS.
(No need to change the setting now, because your 32 bit OS will
prevent seeing any advantage. If you enable the setting when using
your 64 bit OS, then you should be able to see "4GB free" as a
result.)

In addition, you should also check the 3ds max application,
to make sure it is making good use of the memory already
present in the machine. For example, the OP in this thread,
has more memory present and available, than the application
is currently using. So that is something else to check. It
could be, that all you need is to change a setting in the tool,
to make better usage of what you've got. The program might not be
using the memory you've made available to it.

http://www.max-realms.com/modules/newbb/viewtopic.php?topic_id=464&post_id=1480

Paul
 
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