> But how much ram is the computer using? I had a graphite clamshell, it maxed > at 320 MB. It's very possible that you put in a 512 MB card but that the Mac > can only use 320 MB. > > Go to the Apple menu > About this Mac and see what it says... > > > Kirk I have done the 512 meg upgrade and replaced the HD with a 40 GB model to an original 300 MHZ iBook. It works great and uses ALL the ram in both 9.2 and OSX. Apple specs are rarely revised to reflect current state of affairs. When written - 256 was the largest memory stick available. Additionally, I'm fairly certain you need one of the latest 'firmware' updates (available from the software update control panel) to take advantage of 512. Dan