Memories…
The way to check is to hit '?' after a render and see the amount of
memory and swap space you are using. If you keep it below 16 megs,
you'rs OK. Over that, get more memory.
It all depends on textures, shadows, automatic reflections, and of
course the complication of your geometry.
If your scenes render within 2-3 mins, you'll probably be OK for a
while!
Greg Pyros