I have a few thoughts/questions about the processor performance settings on the iMac G5. I understand that in the System Preferences you can change the setting from Automatic to Highest. 1. How much of a difference in the speed is there between the two settings? (Based on personal experience or benchmarks online...) 2. What kind of wear and tear does it put on the processor when you run it at Highest? More specifically, is it going to cut the life of my computer in half? lol or how much does it affect it? I want to get good performance out of it but not cut the life of the computer either.