ATI Radeon 9800
ATI Mobility Radeon x600

Those are just a couple off the top of my head. No problems runningthese with most of Avid's features. In fact, I have an Avid-qualifiedlaptop (HP nx9600) that has an ATI graphics card in it.
 
You might want to boot Avid into Legacy Mode if you're having problems with ATI cards. 

Although other graphics cards might work, for full performance theediting application supports the graphics cards listed in“Requirements” on page 26 for full 3D OpenGL® compatibility.

Driver versions change frequently. Please go to the online support page at www.avid.com for the current driver version information.

For specific information on which graphics card your system supports, go to:
avid.com/products/newscutter/index.asp (example is for Newscutter)

See the following sections for adjustments you might need to make foryour graphics card to work properly with your Avid system setup.

Legacy Graphics Cards (Windows Only)

With some older generation (or ATI graphics cards), you might find thatdesktop video runs very slowly or that a “Serious Error has Occurred”error might appear on startup. Some systems with legacy cards might runbetter if you use the old legacy (DirectDraw overlay) code instead ofthe current OpenGL shaders. If you receive the “Serious Error hasOccurred” error upon start, hold down the “L” and “O” keys whenlaunching until the first dialog box appears. This turns the LegacyOverlay feature on until you restart the system again.

To turn the Legacy Overlay feature on:

1. Select Tools > Console.

2. In the Console command line, type:
    legacyoverlay on

3. Press Enter.

You can turn off the feature by typing “LegacyOverlay off” and restarting the
application.

On some legacy display cards, especially when they are set to higherresolutions, you might need to disable the OpenGL effects to get theoverlays to function. This can be done by holding down the "O" and "G"keys, or using the disable3d console command.

The following features are affected when you set the Legacy Overlay feature on:

• No Full Screen Playback.
• Full resolution HD does not work due to Direct DrawOverlays size limitations.
• On some cards, driver versions, and resolutions, overlays don't work, so you 
   won’t see video playing.