How to select the right Graphics Cards for SolidWorks?
Here is some advice from Greg Corke at Develop3D on how to select a professional graphics card for SolidWorks. He looked at how different technologies affect 3D performance by testing with a variety of models, display states and a wide range of professional AMD ATI and Nvidia Graphics cards.
Download SolidWorks graphics_ DEVELOP3D.
Hope this helps.