I've been using my own personal benchmark file for over a year. The file runs through the basics of visualizations, Transparency, Blended Transparency (alpha), Volumetrics, Reflection, and A solid. On my old Pentium 3/600, the file rendered in 57 min. On my newer test AMD2200+/1500, the same file was done in 35 minutes. Nice curve, and there are a lot fo in-betweeners... When this time becomes 1/60th of a second, I will have realtime-rendering on my test file. Which will rule. (laughs at self!)