AutoCAD 2007-2011 and related family of products
Your graphics card is one of the most utilized components of your computer (outside of the CPU and memory) when using AutoCAD-based products, so it's important you know when you need a tuneup or if you are using a certified display driver. Doing so can improve overall system performance.
To determine if you are updated and ready to go, type "3DCONFIG" at the command line and hit Enter to display the Adaptive Degredation and Performance Tuning dialog as shown. Then click on the Check for Updates button to have the application check if there are any updates to the certified graphics card driver list from the Autodesk website. If you have the check box next to Remind me when a new display driver is available enabled, AutoCAD will then compare your currently-installed display driver to the database and let you know if a newer driver is available.
Settings under the Manual Tune button allows you to change some of the AutoCAD display settings that affect performance.
Depressing the View Tune Log button lets you know what your current system settings are.
So you should periodically check to see if you have the display updates necessary to keep your AutoCAD purring under the hood by checking for updates every so often. Autodesk puts out revisions of this database several times a year.
You may also visit the Autodesk site where the latest AutoCAD certified graphics drivers are listed by navigating to the following link: http://www.autodesk.com/autocad-graphicscard
For Autodesk Inventor products: http://www.inventor-certified.com/graphics/registries.php