"How is that a problem? WinXP then just increases the size of the swap file and goes on as usual. WinXP is providing Poser with an effective address space of 2GB, regardless of your physical RAM - that's the whole point of virtual memory." I know how virtual mem functions. Yes, it will swap files and will go on as usual. Although that does cause other problems after the render. Computer starts to get slugglish. The requirements say "256 mb Recommended". I have 512mb. And they are DDr's.