You might think that since two cores are good, four cores will be twice as good for all your computing tasks, but our tests of Intel's first quad-core chip, the 2.66-GHz Core 2 Extreme QX6700 chip tell a different story.
Exclusive PC World tests show PCs equipped with Intel's new Core 2 Duo processors set a new record for desktop performance. The processors have helped Intel decisively reclaim the power desktop crown from competitor AMD.