AutoCAD Services & Support

Enabling 3GB switch on Windows Vista™

Published date: 2007-Sep-25
ID: TS1069947

Applies to:
AutoCAD® 2009
AutoCAD® 2008
AutoCAD® Civil 3D® 2008
Autodesk® Inventor™ Professional 2008
Autodesk® Inventor™ Suite 2008
AutoCAD® Land Desktop 2008
AutoCAD® MEP 2008
AutoCAD Revit MEP Suite 2008
Autodesk® Inventor™ 2008
Autodesk® Productstream™ 2008
Revit® Architecture 2008
Revit® Structure 2008
Autodesk® Vault 2009
Autodesk® Vault 2008

Issue

You want to enable the 3GB switch on the Windows Vista™ operating system.

Solution

To enable the 3GB switch on Windows Vista™

  1. Right-click Command Prompt in the Accessories program group of the Start menu. Click Run as Administrator.
  2. At the command prompt, enter "bcdedit /set IncreaseUserVa 3072"
  3. Restart the computer.

To turn off the 3GB switch

  1. Right-click on Command Prompt in the Accessories program group of the Start menu. Click Run as Administrator.
  2. At the command prompt, enter "bcdedit /deletevalue IncreaseUserVa"
  3. Restart the computer.

For more information on the 3GB switch, refer to the following Microsoft MSDN article:

http://msdn2.microsoft.com/en-us/library/ms791558.aspx

Give us your feedback on this document:
 Resolved my issue.
 Helpful but incomplete.
 Difficult to find.
 Difficult to understand.
 Did not resolve my issue.
 Document contains broken links and references.
 No comment.
 
AUTODESK DOES NOT GUARANTEE THAT YOU WILL BE ABLE TO SUCCESSFULLY DOWNLOAD OR IMPLEMENT ANY SERVICE PACK OR WORKAROUND, OR ANY OF THE TIPS, TRICKS, EXAMPLES OR SUGGESTIONS OUTLINED IN ANY AUTODESK PRODUCT SUPPORT TECHNICAL DOCUMENTS. TECHNICAL DOCUMENTS, SERVICE PACKS AND WORKAROUNDS ARE SUBJECT TO CHANGE WITHOUT NOTICE TO YOU. AUTODESK PROVIDES TECHNICAL DOCUMENTS, SERVICE PACKS AND WORKAROUNDS "AS IS" WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL AUTODESK OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF DATA, OR LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, THAT MAY OCCUR AS A RESULT OF IMPLEMENTING ANY SERVICE PACK OR WORKAROUND, OR ANY SUGGESTION OUTLINED IN ANY AUTODESK PRODUCT SUPPORT TECHNICAL DOCUMENT, EVEN IF AUTODESK OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.