It looks like a logical decision to upgrade the AMD 690G chipset to the 55nm fabrication process, equip it with a new Southbridge, and launch the resulting chipset (AMD 740G) for $50-60 motherboards.
A finer fabrication process reduces manufacturing costs, which is critical for entry-level chipsets, and makes the chipset more attractive in terms of its functionality. Motherboards on this chipset will share the shelves in retail stores with AMD 690G products for some time.
So users will enjoy a rich choice of inexpensive motherboards. System integrators will most likely prefer motherboards on the new chipset, which have lower prime costs, so they'll have more attractive bulk prices.
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