Perhaps I should clarify... I'm running a Gigabyte GA-EP35-DS3L (with ICH9) I would like to enable AHCI in Windows XP The initial post by puntomx described how to do that on a current installation after some minor modifications. On page 3 of this topic, a method for doing this on a fresh install is also listed by Vascoman Both methods are basically the same, with the only real exception being a registry edit What I'm saying is that the instructions listed in both of those posts are no longer valid for the latest chipset drivers, posted on June 2nd, because the line that needs to be replaced is not present. I was just wondering if the original poster or anyone else has had a chance to look into this yet. I have not tried anything yet myself, other than seeing if Intel had incorporated support for AHCI on ICH9 in those drivers. Unless I messed up when I slipstreamed the drivers into my Windows install cd, the answer is no.