How to Set the Maximum Memory to be Used by Windows 7
Information
This will show you how to specify the maximum amount of physical memory (RAM) used by Windows 7 to simulate a low memory configuration by using less RAM, or to make sure that you are using all of your installed RAM.

Windows 7 uses all of your installed RAM memory by default.


Warning
You must be logged in as an administrator to be able to do this.






Here's How:
1. Open the Start Menu, then type msconfig and press enter.

2. If prompted by UAC, then click on Yes.

3. Under the Boot tab in System Configuration, click on the Advanced options button. (see screenshot below)4. To Have Windows 7 Use All Installed Memory -
A) Uncheck the Maximum memory box, and click on OK. (see screenshot below)
NOTE: This is the default setting.B) Go to step 6.
5. To Have Windows 7 Only Use a Specified Maximum Amount of Memory -
A) Check the Maximum memory box, then type in how many MB of your installed Memory that you want Windows 7 to only be able to use up to and click on OK. (see screenshot below)
6. Check the Make all boot settings permanent box, and click on OK. (see screenshot below)7. Click on Yes. (see screenshot below)8. Click on the Restart button. (see screenshot below)
WARNING: This will restart the computer immediately. Make sure you save and close anything open you do not want to lose.

Tip
If you checked the Don't show this message again box and would like to restore this Restart box to display again, then see: How to Restore the System Configuration Restart Prompt in Vista or Windows 7



9. When Windows 7 is finished restarting, it will now be using only the maximum amount of memory that you specified.
NOTE: You can look in Task Manager (CTRL+SHIFT+ESC) to confirm this amount of memory.
That's it,
Shawn

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