I tried a search to find out about this, but couldn't really find a definitive answer so... I just bought a new iBook yesterday, and now am running a little too low on cash to get a ram update. However, my friend has a stick of Kingston PC2100 512MB that he is currently using in his Sony Vaio laptop that he can lend me for the time being. Is it safe for me to use this? Can I at least try it, or do I face some horrible death for my new toy if I put it through this?