Initially, on all of the W2K installs I've done, I thought that Windows had used the "ACPI Uniprocessor" driver; and I've used quite a few different K7 chipsets with W2K--KT133, KT133E, KLE133, KT266, KT333 and SiS730 (strangely nothing by AMD...). I just checked, and the SiS based machine is using the plain ACPI PC driver--I'll have to check the KT266 and KT333 machines when I get home.
Side note--one machine transitioned fine from the KT133E to the KT333 w/o reinstalling W2K.
Now I'm curious to find out if I can simply move to the plain ACPI driver from Standard PC, since it appears that there is a significant performance hit in switching to "Standard PC".
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