From what I understand, Poser does not handle Dual processors...it's just not written for it. I have an Athalon 550 and 256 Megs of Memory, and rendering any kind of complicated mesh or transparency is still pretty slow. Get the memory though, you'll notice a big difference in the program itself, if not rendering. Get the P3 750..the faster processor, the faster the render. -Darth_Logice