Hello, I'm confused about memory and would appreciate any clarification. I always hear that more memory is better, but what if the following is true? 1. Running an iMac G5 with 512 mb 2. No heavy apps. According to Activity Monitor, I always have between 80-100 mb of free memory. If I'm not exceeding my current ram, would there be any benefit to adding say another 512? Or would the additional ram be completely wasted (unless more memory intensive apps were used)? In other words, would the ram allocation (or whatever the correct term is) be different (more efficient, faster) if I had 1gb as opposed to 512mb if I never went over about 400 mb in usage? Thanks so much for any comments.