You need at least 256Mb of RAM to do anything much with P5. But I do get useful work out of it on a K6-III+ 450 with that much RAM under Win2K Pro. My dream system would be two very fast P4 processors on about 2Gb of fast RAM. And the extra procesor WILL help because the OS can shovel out tasks to it while Poser uses one all to itself for rendering, etc. And any serious render will take long enough that you might want to be surfing or doing other work while Poser renders in the background. Hair IS awfully slow on my machine, but if I let it complete it does do it.