3D view is a real-time application and all objects are dumped straight into main memory. You will need a more powerful graphics card with more graphics memory to be able to use the advanced rendering whilst keeping the movements smooth.
Yes, that should be fine with the advanced rendering. I cannot guarantee that it would be perfect with a lot of objects and shadows enabled though (the shadows feature is not very efficient).
Also if you are using 2 screens make sure the 3D window is on your primary monitor.