The failure of the South Bridge of my Intel P965/IHC8 motherboard compels a new replacement, with the unavoidable re-installation of Vista (and all my apps). I am switching to an Intel P35/IHC9 one. From previous experience with another P35/IHC9 system, I know that ATI Home -11 installed on Vista works when Vista was installed with the SATA controller set to IDE mode. I am wondering whether anyone on the forum has experience with ATI Home -11 on a motherboard the BIOS of which was set to AHCI [Advanced Host Controller Interface] mode for the Vista installation? Indeed, I would be grateful for any comments on the benefits/drawbacks (experienced as opposed to theoretical) of AHCI. I am using (2x) WD 500GB SATA 3GBs. Since Vista's installation disk is equipped with the drivers to recognize AHCI mode (unlike Wxp, which requires an F6 supplemental Floppy Disk), I assume that Vista PE — which I have used very successfully with Mustang's Plug-in — will recognize SATA drives in AHCI mode. Anyone confirm this? Many thanks!