I have just learned a nice trick how to save RAM on a machine with Autodesk Inventor.
If you are running Content Center or Vault locally, it is not neccessary to have it running when you are working in other applications and Inventor is not launched. The SQL Server engine (MSDE) takes a substantial amount of your system memory and this memory can be saved. You can start the SQL services just before you launch Inventor. To automate this, start your Inventor session with a batch file, not by the default desktop icon (shortcut).
Create a textual .BAT file:
net start "Autodesk EDM Server"
net start MSSQL$AUTODESKVAULT
net start MSSQL$INVENTORCONTENT
"C:\Program Files\Autodesk\Inventor 11\Bin\Inventor.exe"
net stop MSSQL$INVENTORCONTENT
net stop MSSQL$AUTODESKVAULT
net stop "Autodesk EDM Server"
Create a desktop shortcut to this batch file and start all your Inventor sessions with this new shortcut. You will have much more RAM available for your other Windows applications.