After much fanfare, Intel's first quad-core CPU has finally arrived! The Core 2 Extreme QX6700 packs four processing cores running at 2.66GHz and 8MB L2 cache all in one package. But how well does it perform, and how far have we overclocked it so far? In this article we explore the performance of this CPU, as well as Dell's first quad-core XPS system, the Dell XPS 710. Read all the details inside!