Reviewed on November 1, 2006If you thought dual cores were over the top, get ready. Intel presents the Core 2 Extreme QX6700, a single CPU with four distinct processing cores. At $999, the first quad-core CPU will remain an enthusiast part for a while, but as a glimpse of the future, it's clear that clock speed is out and core counts are in.TAGS:quad-core, multi-core, Intel Core 2 Extreme, clock speed, CPU, dual-core, Intel Core 2 Duo, digital media, Intel, AMD, PC