Rendering is an extremely complex and time consuming process by which your PC converts the 3D geometrical description of the scene into a 2D picture. Ram can really assist in (making) the scene and contribute as well to the render however I would study the manual on rendering as most of the time the speed has to do with the multitude of settings you can create in the Render Options menu. Vue4Pro seems to take much more ram than Vue4 I guess it really depends on you and the type of scenes you wish to create. I am currently working on a 4.6 million polygon scene in Vue4pro and with the quality settings I prefer for prints this scene will take about 15 days to render with 1 gig of ram on my XP OS. :O) Regards.