usually with VIA chipsets the "a" version is a more advanced version of the regualr chpset and offers better performance. Although the KT400A has good performance it still is bested by the NForce 2 which is the best AMD chipset available right now.
The Nforce might be better then the VIA,
but I'd still go for the VIA, it's just too bad the Nforce chipset is not supported (well) by linux nor bsd !!
ASCII stupid question, get a stupid ANSI.
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