Intel introduced its most important product line in six years, unveiling 10 microprocessors that are expected to help the world's largest chip maker retake ground lost to smaller competitor Advanced Micro Devices. <A HREF="http://news.yahoo.com/s/ap/20060727/ap_on_hi_te/intel_chip_debut">The Core 2 Duo microprocessors,</A> which are being rolled out gradually over the next month, are Intel's first desktop and mobile chips to feature a blueprint designed to deliver significantly better performance while requiring less power and kicking off less heat.