My girlfriend and I have both recently taken the plunge and ordered new powerbooks, her the 12" and I the 15" 1.33 models with stock ram. I am going to upgrade mine with ram from crucial and want to get 1gig in two sticks. My question is whether the extra 256Mb I take out of my 15" will work in my girlfriend's 12" powerbook so she can have 512Mb. I see on the apple website that both are listed as having PC2700 (333MHz) DDR SDRAM, which is also what crucial suggests to upgrade both. However on another suppliers list I have, it says the 12" as using PC2100 (266MHz) ram. Obviously the apple and crucial specs are more likely to be right, but I just wanted to check here if my extra stick will work in her computer or even if anyone else had done something similar without problems.