nVidia cards are usually best for SolidWorks. As long as you don't have multiple solidworks part windows at the same time, then using a non-quadro card should be fine for your work. But if you find that you have, lets say, 10+ part windows open at a time then you can run into some bad slowdowns. I think this is because all the information is stored in graphics memory which then gets chewed up. Make sure the
7400 has at least 64mb, preferably 128mb, of PHYSICAL memory. A bunch of laptops these days have cards that use both physical and system memory. The latter is waaaaaay slower and is just there to produce more marketing babble about better performance when in reality it offers minimal improvements.