Since spring 2011 I own an ASUS M4A89GTD PRO/USB3 motherboard. In January this year a Crucial SSD was added. The Crucial should run in the AHCI mode. The PC is equipped as follows: AMD Phenom II X4 910 2 X 4 GB Crucial DDR3 2 Seagate ST32000641 AS 1 Seagate 2000DL003 Optiarc Sata optical drive Drivers were taken from the system cd rom. A dual-boot system XP – 7 is used. The installation of Windows 7 with bios setting Sata1-6 AHCI, Sata 5-6 IDE; or Sata 1-6 AHCI went all right. After boot the drives were recognised and installed. The program CrystalDiskInfo showed all drives and their temperature. For XP I tried the installation of the AHCI drivers in an already installed XP system (Phenomic, How do you enable AHCI mode AFTER you have installed XP, 01 August 2009); made an installation cd with the AMD driver AMD AHCI Driver V3.2.1540.35 for Windows 32/64bit XP (Version 3.2.1540.35/1.2.0.16) in the bios settings Sata1-4 AHCI, Sata 5-6 IDE and as well Sata 1-6 AHCI. In all cases XP booted up In AHCI mode (register settings were slightly different). However; CrystalDiskInfo doesn’t show disks and their temperature (a message popped up saying that in Raid SMART values couldn’t be displayed). Obvious this AHCI mode acts like Raid. What to do?