Most "self-proclaimed gurus" have determined that the only real difference between 64-bit OS vs 32-bit OS is the amount of supported memory... This is the most obvious difference, however this is far from the only difference. I was catching up on my digging this morning, and I came across an article at bit-tech.net interesing article that discusses 64-bit processors. I can't that I went into the article knowing everything about 64 bit vs. 32 bit, but it seems to be a bit clearer now. It will be interesting to see how 64 bit computing affects us, and how the OS developers embrace the new platform. YAY FOR MEGABITS!