AMD Athlon XP 2000+ 512MB SDRAM GeForce FX 5200 Ultra 120GB hard drive Windows XP (Home Edition) Running Pro Pack and P5, and they both work much better under XP than my previous OS, Win98 (First Edition). The improved memory management allows me to render longer animations and more complex scenes without locking, crashing, or aborting. I'll invest in additional memory soon, but I probably won't upgrade the processor and motherboard for another year or two. I'd like my next CPU to be 4GHz (or its equivalent), and I expect it'll be a while before one of those is both available and affordable.