Advanced Micro Devices Inc. has announced 600- and 700-MHz Durons for notebooks, selling for $75 and $123 in volume. Japan’s number one PC maker. NEC, is using the 700-MHz Mobile Duron for its LaVie U series of notebook PCs. The chip uses AMD’s Duron core, but runs at lower voltage and consumes less power. It uses a 100-MHz front-side bus and has 3D instruction set extensions.