Maximum Memory Supported in XP PRO SP1

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

My PC is a Dual Opteron 2200 and has the ability to take 8gb of ECC RAM I currently have 3gb, but would like to know if I do upgrade to the full amount how much of this will Windows XP Pro be able to address.

I have read there is a 4gb limit. Yet I have a colleague who has a dual Xeon with 6gb that seems to work just fine with Windows XP so I am unsure as to what is allowed and what is just a support boundry for Micro$oft

Thanks.

Patrick
 
Windows XP will recognize up to 4GB of RAM. Anything exceeding
4GB will not be recognized or supported.

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User

Be Smart! Protect your PC!
http://www.microsoft.com/security/protect/

--------------------------------------------------------------------------------------------------------------
--


| My PC is a Dual Opteron 2200 and has the ability to take 8gb of ECC RAM I currently have 3gb, but would like
to know if I do upgrade to the full amount how much of this will Windows XP Pro be able to address.
|
| I have read there is a 4gb limit. Yet I have a colleague who has a dual Xeon with 6gb that seems to work
just fine with Windows XP so I am unsure as to what is allowed and what is just a support boundry for
Micro$oft
|
| Thanks.
|
| Patrick
 
I also read that to go above 3Gb you must edit boot.ini to add a /3GB switch
to the end of the line starting XP.

PJB-A2 said:
My PC is a Dual Opteron 2200 and has the ability to take 8gb of ECC RAM I
Click to expand...
currently have 3gb, but would like to know if I do upgrade to the full
amount how much of this will Windows XP Pro be able to address.
I have read there is a 4gb limit. Yet I have a colleague who has a dual
Click to expand...
Xeon with 6gb that seems to work just fine with Windows XP so I am unsure as
to what is allowed and what is just a support boundry for Micro$oft
 
4294967296 or 2^32

When a 64 bit OS is out, it will be 2^64 or
18446744073709551616


message | Windows XP will recognize up to 4GB of RAM. Anything
exceeding
| 4GB will not be recognized or supported.
|
| --
| Carey Frisch
| Microsoft MVP
| Windows XP - Shell/User
|
| Be Smart! Protect your PC!
| http://www.microsoft.com/security/protect/
|
| ----------------------------------------------------------
----------------------------------------------------
| --
|
|
|
| | My PC is a Dual Opteron 2200 and has the ability to take
8gb of ECC RAM I currently have 3gb, but would like
| to know if I do upgrade to the full amount how much of
this will Windows XP Pro be able to address.
| |
| | I have read there is a 4gb limit. Yet I have a colleague
who has a dual Xeon with 6gb that seems to work
| just fine with Windows XP so I am unsure as to what is
allowed and what is just a support boundry for
| Micro$oft
| |
| | Thanks.
| |
| | Patrick
|
 
That is only required when you have an application that was specifically
written to use memory above the 2GB line - in other words, if the programmer
didn't write the application to use more than 2GB, then the switch will be
meaningless, except you reduce the amount of memory available for XP (the
OS) to use for paging, caching, and loading the kernel. By default, if
having the full 4GB of memory available, WinXP will partition the memory to
2GB for applications and 2GB for the OS, all the /3GB switch does it take
from the OS and gives to applications, it none of your applications can use
more than 2GB, 1GB will be wasted.
 
Back
Top