Other things that can help are to avoid adding unnecessary detail to your parts and assemblies. This can reduce the number of triangles your CPU must calculate by orders of magnitude. Make sure 'Apply to all referenced part documents' is checked. One easy way to reduce the tessellation time and speed things up is to go to Tools>Options>Document Properties Tab>Image Quality and slide the top slider for 'Shaded and draft quality HLR/HLV resolution' to the left. Solidworks seems to want to regenerate the tessellation any time you rebuild or move any part of an assembly. Flat surfaces are fairly efficient, but curves can require thousands of triangles to render properly. The more complex your model, the longer it takes to tessellate. When you define a feature, your computer has to figure out how to turn that definition into triangles so it can send a fairly accurate representation of the model to your graphics card to be rendered on your screen. Rebuilding and any sluggishness you might encounter while it says 'Generating Graphics' in the status bar is on your CPU. The only time GPU is going to help you out is if your FPS is too low while rotating the model.

Solidworks with geforce