yeah , but it depends on how complex of a model you have on screen…
I dont use solidworks, but I know with 3d modeling im the kind of guy that likes to tweak and even model the project through the 3d viewport and rotate it around , if its laggy and hard to use then it really will change the workflow alot
also probably the biggest advantage is when it comes time to render a screenshot or animation… I know with a desktop pc running intergrated graphics it could take lets say an hour for an image to render where as it could take maybe 5 minutes for a high end graphics card. Thats just an example not actual figures.
@ adam, that quatro 600 will be fine for sure