They're gamer cards, but they do OpenGL reasonably well, and DirectX VERY VERY WELL.  In my opinion they're a very serious option when thinking about Max (DirectX preview rendering).

http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=8108755

Viewport Renderer

• DirectX® viewport shading displays materials as they would appear in other real-time applications.
• Support for all shader types is now available via MAXScript—including HLSL and Cg shaders—along with shader performance enhancements. Work with CgFX files alongside .fx files in the viewport.
• Maximize productivity and creativity with multithreaded viewport.

My Freebies