Clear somthing up for me please guys... No not that, I already got cream for that The new Intel duo cores... from think secret "The dual-core version of Yonah, which sources say will be marketed as "Centrino Duo," will be available in a low-voltage version at speeds of 1.5GHz, 1.66GHz, and 1.83GHz, while a faster "performance" version will ship at speeds of 1.66GHz, 1.83GHz, 2.0GHz, and 2.16GHz. Bus speeds and L2 cache are expected to remain the same between the variants, at 667MHz and 2MB, respectively" -- Question then is this. Are the low-voltage versions as fast as there higher voltage brothers? If so why not just have low-voltage versions?? If performance on low-voltage 1.83 is worse than the high-voltage 1.83 how can they be called the same clock speed? Just Your help in understanding this is appreciated as it will help me decide between iMac and macbookpro purchase. Thanks..