I think the K7S6A is based on the SIS745 chipset, supports DDR333 (but no SDRAM slots this time) and actually has overclocking options, unlike the K7S5A. I don't know of anyone who sells them though (search at pricewatch for sis745 or K7S6A returned nothing, and I don't recall seeing a review). It probably at least a few weeks away from hitting the market .