Since we're already reviewed both of these basic technologies, I will spare you most of the gory details here. If you'd like more info on the "Kentsfield" quad-core processors from Intel, go have a look at our Core 2 Extreme QX6700 article. And if you're unfamiliar with AMD's Quad FX platform, you can find our take on it right here. The Cliff's Notes version goes like this: neither of these products feature a truly native quad-core processor. Kentsfield is comprised of two Core 2 Duo chips cuddled up together in a single package. You get four cores in total, but in groups of two—and the two chips have to communicate with one another by means of the system's front-side bus. The great advantage of this scheme is that Core 2 Quad variants can use the same motherboard infrastructure as the Core 2 Duo..