So I just bought a new iBook and want to upgrade its RAM. Currently, it has 512, but I want to drop a 1gb chip in. I know the official ram is pc2100, but I have heard that pc2700 ram will work just as well, it's just clocked differently. The extra 256 chip in my computer right now is pc2700. Can I just drop a pc2100 chip in and have everything work fine? I am only asking because it will open my options if I happen to be able so snag a 1gb chip on ebay. any thoughts?