Seth,
   Here is what the manual says about it:
Enhanced PCI Bus Master IDE Controller with Ultra DMA 33/66/100 Support.
When I hooked up the hard drives I used the ribbon that was designated for 
ATA 100 on both drives.  My bios reads ATA 100 for the master and slave on 
IDE 0 (both hard drives) and 66/33 for IDE 1 (the cd-rom and zip 
drive).  Since I flashed the bios I have not been able to duplicate the 
errors I was getting, so apparently its working right.  Hope this is the 
info you needed.  Moe
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