From what I've read, some Mac models have been picky about the RAM specs. It may be best to buy Crucial RAM from NewEgg, that way you can check the compatibillity on Crucial's website before you buy. Or you can buy RAM from a Mac specialist such as OWC (http://www.macsales.com).
I bought the cheapest no-name 512MB DDR333 SO-DIMM NewEgg had on sale, and it works great in my PowerBook. But I have heard that others were not as lucky.
I bought the cheapest no-name 512MB DDR333 SO-DIMM NewEgg had on sale, and it works great in my PowerBook. But I have heard that others were not as lucky.