I maxed out my 1 GHz 12″ PowerBook G4 today with the full 1024 MB Samsung/Apple OEM RAM chip. Such a difference. Smooth, fast, no overheating, and no kernel panics. Bad RAM sucks. I had a freebie 512 MB chip tossed in when I got this machine. Had at least one kernel panic a day with that thing. So far the OEM chip is smooth as silk. Got it from MemoryX/ We Love Macs at the Macworld show earlier this morning, at about $200 less than what Apple is selling it for from their own site.