( Keep the "Intel Robson Technology" (What a name to use in the BIOS) Disabled first and just set SATA as AHCI. ) I tried both[Disabled and Enabled], but failed. ( Or what problem do you have with point 4? ) P5K has Default AHCI Mode on only BIOS 0406. (Not BIOS 0408, 0603, 0805...) o The step 4 on 0406 : - ( SATA Configuration[intel Robson Technology - Enabled or Disabled] + Configure SATA as [AHCI or IDE] ) ( I couldn`t go to xp. ) - ( SATA Configuration[Disable or Comparable or Enhanced] + Configure SATA as [AHCI or IDE] ) ( If I select IDE... ) o The step 4 on 0805 : - ( SATA Configuration[Disable or Comparable or Enhanced] + Configure SATA as [iDE] ) ( I couldn`t see AHCI Mode. ) ( As I said above, 0805 has only IDE on "Configure SATA as" ) ------------------ Intel Robson Technology ( http://www.intel.com/technology/magazine/c...robson-1206.htm ) Robson is the code name for a new Intel® platform technology that uses non-volatile memory (Flash memory) to increase system responsiveness, make multi-tasking faster, and extend battery life. Robson technology will be available on Intel’s forthcoming Santa Rosa platform—the next-generation mobile platform building on the power savings and performance benefits of Intel® Centrino® processor technology. Robson technology is designed to support two new features of the upcoming Microsoft Vista* operating system: ReadyBoost* and ReadyDrive* technologies... -------------------