"Intel was the first to the market with a chipset that natively supported the ATA100 standard. The Intel i815e "Solano" chipset was introduced almost four months ago. VIA's answer to this was the introduction of the VIA 686b southbridge which also adds ATA100 support natively."
FULL STORY @ VIAHARDWARE (http://www.viahardware.com/dfiak74ec.shtm)