Poser does not use the graphics card at all. Speed improvement from a 450 to 1.2 processor should be significant. I went from P3 450 to Athelon 2800+ and Poser is now really fast and I can use multiple figures with no problems. Daz studio uses opengl rendering so the graphics card is relevant. There are a lot of things you can do in Poser (5) that Daz studio does not do.