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Win XP - Boot.ini question

Last response: in Windows XP
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October 16, 2009 7:50:19 AM

Hi all,

While looking at the boot.ini file to enable 3gb switch, I noticed /TUTag=QDGH28 at the end of the line.
Ive tried looking up what it does, but it isn't listed here
http://technet.microsoft.com/en-us/sysinternals/bb96389...
nor anywhere else, so I am unaware as to what it does.
Anyone have any ideas?

Copy of Boot.ini:

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect /TUTag=QDGH28


Also, would anybody know if enabling the 3gb switch in windows xp, with a high video card ram, has any effect on
performance?

Thanks

More about : win boot ini question

October 20, 2009 9:30:23 PM

What 3 GB switch are you refering to?
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October 21, 2009 12:30:39 PM

Quote:
What 3 GB switch are you refering to?


From the Microsoft website.

http://www.microsoft.com/whdc/system/platform/server/PA...

Quote:
The virtual address space of processes and applications is still limited to 2 GB unless the /3GB switch is used in the Boot.ini file.
The /3GB switch allocates 3 GB of virtual address space to an application that uses IMAGE_FILE_LARGE_ADDRESS_AWARE in the process header. This switch allows applications to address 1 GB of additional virtual address space above 2 GB.

The virtual address space of processes and applications is still limited to 2 GB, unless the /3GB switch is used in the Boot.ini file. The following example shows how to add the /3GB parameter in the Boot.ini file to enable application memory tuning:
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Best solution

October 21, 2009 1:49:25 PM

The TuTag portion has to do with the program Tune Up Utilities.
It may or may not be on the system currently.
If it isnt on your system you can delete the entry.

As for the performance question the fairest answer is no it wont affect it.
The 3G switch is only helpful in some specific situations and a program need to be written correctly to use it.
Some examples are Photoshop, Flight Sim X and large data bases.
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October 21, 2009 2:52:49 PM

Quote:
The TuTag portion has to do with the program Tune Up Utilities.
It may or may not be on the system currently.
If it isnt on your system you can delete the entry.


^ Thank you very much for that, couldn't find the answer anywhere.

I had figured that /3b switch would be used for an overall system boost, allowing it to use more memory, but if that is not the case, I
think I'll refrain from using it, Thanks again Pat
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October 22, 2009 1:50:03 PM

Yeah that just the thing, it doesnt create more memory. It creates address space.
Think of it as an apartment complex with one giant room as compared to one with 30 apartments. You still have the same amount of room but with more addresses.
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