The Extreme Edition’s front side bus remains at 1066MHz, while volume business and consumer buyers will have to continue scraping by with an 800MHz bus.

Monday's launch finally brings Intel’s EM64T technology to the desktop, putting it on a par with AMD's hybrid platform.

Clock speed on the Extreme Edition has been cranked up to 3.73GHz from the current 3.46GHz. The 6xx line features five models, ranging from 3GHz to 3.8GHz.

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