Frankly, with 512, I think the CPU is a more likely source for improvement. Thats 60% increased throughput. While the RAM is a 100% increase, you have to assume that you are needing 1G to run poser for that to benefit you 100% of the time. Unless you are always doing some huge scenes, 512 should be fine. I have 1G (2 512 sticks) and I think that with my machine (750mhz) the second stick is a waste. Pulling it out changed nothing about posers performance (I even got silly with the content) Eric