When you switch the new macs from better battery life to higher performance does the CPU performance increase. I know this seems a silly question but i'll explain the reason for my asking. I had macs for years and am well up to date with computer technology. I have assumed that higher performance only switches on the 9600m gt, however, when I had my ibook running tiger there was the option to change processor performance. There were three options better battery, normal and high performance [this might not be the exact names but indicates where i'm heading]. Now when I change my MBP to high performance I don't notice a speed increase, so do they allow the processor to run at full performance in better battery life? and if so that would mean higher performance is only for the graphics.