Hello there, A few months back I purchase a top of the range powerbook with 1GB ram and everything else maxed out. It is a very nice machine...especially the software and aesthetics. However, recently I am beginning to question the performance. I haven't had any hiccups until just recently. I purchased an astrophysics program that accuratly models the night sky (and everything in it) on a particular date and time. I noticed that the computer is a bit sluggish when rendering the sky. Also, when you want to pan around in the view (ie: look at other parts of the sky) the computer really lags when rerendering the image. This has kind of thrown me for a loop, because for what I paid for this computer I would have expected it to run this program no problem. It could be an issue with the way the program is written, but I doubt it. I do only have one GB of ram, and this is an intensive program, so perhaps maxing out the ram would help?? I have entertained the idea of selling this PBook in favor of a new iMac, but I just cant sacrifice the portability. Any ideas?