I ordered a 1gb Hynix PC2700 200 pin Sodimm Ram sitck via eBay. I installed it onto my iBook G4 last night and the system analyzer said "128mb" of Ram and wasn't showing the upgrade. It said the Ram slot was "Empty." At first I thought I hadn't placed the Ram stick in correctly so I took it apart again and firmly pressed against it and checked how it was seated. Put it back together, turned it on, same thing. What's odd to me though is the computer boots a whole lot faster. Is it possibly that the iBook is using the Ram but just not showing it in the system analyzer? Intell in this thread said it might be a high density stick and PPC Macs only can use low density. How am I supposed to know this though? eBay sellers usually don't have anything about low vs high in descriptions. Even the Crucial ram stick on Amazon doesn't say this.