I am using an Asus P5W64-WS MB, XP Pro SP3, and an older 74GB WD Raptor. I've never really messed around with doing the "F6" installation of RAID drivers when installing XP. Instead I've always just selected the default in the BIOS where the SATA drive is treated like an IDE device and I did not have to install the drivers during OS installation. I currently see under a speed utility that my Raptor is giving transfer rates of 85MB per sec. maximum, 24 MB per sec minimum, and 73 MB per second average. My question is this - what sort of improvements might I see if I did a clean install of XP Pro and configured the drive as an SATA drive using the F6 driver installation option during install? Also, is it worth going to a RAID 0 configuration if I am going to do the SATA thing? I would be using the ICH7R controller for that. Finally, what does the AHCI option allow, and is that used with the IDE or F6'd SATA driver installation? Thanks for any help.