Hey, I felt I just need to throw this out there and see if anyone else ever experienced this...I upgraded my 1,1 with 5355 chips so now I have a 2.66 Octo machine. Speed is great. The only issue I've had since upgrading is that when I restart my machine, it will "whirr" the fans, then 2 seconds later it will "whirr" then again, it is an endless loop. The fix is to hold down the power button until the machine shuts off, and if I press the power to boot up cold, it does the "whirr" and starts up just fine. Kind of a pain in the butt though. Anyone else ever had this happen?? Any advice would be great.