Earlier this month Intel debuted their dual-core Pentium Extreme Edition 840 to the public, launching the first systems based on the technology at the beginning of this week. Today it's AMD's turn, and unlike Intel, AMD is not constrained by the front-side bus. Read all about AMD's dual-core plans, including X2 and Athlon 64 FX-57, as well as the future for AMD, and of course, you'll also see how AMD's dual-core offerings compare to Intel's as well as seven other processors in our Opteron performance preview article!