I'm afraid you'll not like my kind of answer since I'd like to know the same thing... All I can say is that a P4 1Ghz with 256 RAM (my PC) is clearly not enough!!! I suppose that a lot more RAM would be good, but it seems like no one out there would answer clearly the question (I tried Curious Labs - at least humourous the reccomended system requirements for Poser5...I'd like to see what they render with that - and many themed forums). I don't know what kind of OS you run, but "someone" say that Win98 isn't able to manage more than 128 Megs of RAM per program, so in that case would be the case to upgrade to Win2000 or XP... but I can't say it's an unanimous opinion. Imagine that doesn't help too much, sorry... I can only hope someone else will clearly answer the question, so we'll know what to do... Alberto