Richard Gilmore said: >He does have a 512 stick of third party cheap-o-RAM. But I bought the same >brand stick of no name RAM for my G5 and it's fine. But that could be the >problem. I'll see about switching it. It might be the individual stick of RAM. A stray static charge could have zapped it, and it might not even have caused it to go bad right away. Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) Routine OS X Maintenance and Generic Troubleshooting http://www.macattorney.com/ts.html