My Dual 1.25Ghz G4 Powermac keeps crashing non-stop! I am not kidding, it feels like I am on a PC. The grey gradual scrolling screen comes up with the message saying i need to restart my computer. I have another 200gb hd installed as well as 3rd party ram. I was having problems with it before about two weeks ago and i took it in and they didn't find anything wrong with it...but now it keeps giving me trouble. I ran the hardware test cd and it said there was something wrong with mass storage and when i tried to see the details. Then I ran the TechTools cd that comes with applecare, and everything passed including the ram untill it got to the last task, something about storage organization and it completely froze up. If anyone knows what I can do please post! Thank you for any help!