on quad core cpus is there a way to make blender utilize the whole thing in win7 while rendering? I mean it uses all the cores when it gets to actually rendering the picture, but in the phases before that (that also take up a lot of time) like “building raytree” and “preparing scene” or something like these it only uses one. This on an i7 means it only uses 0.5 cores of the 4, and also means that the 3.4 ghz i7 is not rendering the scene I tested with significantly faster than my core2duo 3.2. (8 secs vs 9, not a lot of improvement). The rendering part is blazing fast compared to the c2d, but the preparing might even be slower as it only uses 12% of the cpu.