Hey, I have a 1.33Ghz 12' Powerbook with 768mb Ram. I'd like to upgrade this. As I understand it, the max RAM for this machine is 1GB. I'm just wondering if anyone could give me an idea as to how much of a speed boost I could expect from this upgrade? is it worth doing? Will it make a difference? Spoke to Apple technician this morning, and I think he said he would take out the 512mb RAM chip and install a 1Gb one - but wouldn't this give me 1.25GB, approximately? I didn't think this machine could take that. He left me a little confused. Thanks in advance for any help. EDIT: Have just found out that I can actually max my machine out to 1.25GB for a fairly cheap price. Seems worth doing then, yes? Anybody made a jump from 768 - 1.25 before? Did it make a big difference?