Hi all :) I have a question about setting up a computer to be AHCI compatible using Vista. I'm not a computer genius and this is only my second build in about 8 years, so bare that in mind ;)
When I bought my computer components, the retailer installed the cpu, ram and BIOS. When they setup the BIOS, they made it IDE, so my SATA2 drive is running a lot slower than it should be running. When I had them flash my BIOS they notified me of the setting. Now apparently I have to re-install Vista AFTER I change the BIOS to AHCI. Is this true? Can anyone give me detailed instructions on how to get my computer running in AHCI? Is it as simple as changing the drives and legacy support devices to AHCI and then booting from the Vista cd-rom and setup from there?
Any help or advice is greatly appreciated.
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  1. Your SATA drive should NOT be running any slower in "IDE" mode. Why do you think it is running slower than it could be? I'd just stick with the "IDE" mode.
  2. First, it's important to know if your dvd drive is SATA or a PATA one, because Vista setup from scratch, has some issues detecting a dvd drive in SATA working in AHCI or RAID mode ( i have this problem). The performance difference between IDE and AHCI is near noexistent, but try to change the iDE mode to Enhanced.
  3. Change the drive controller in Device Manager from SATA to SATA/AHCI using the driver disk you got with the motherboard. Reboot, go into the BIOS and change the controller to AHCI, save the change. Good to go, if you really want to...
  4. Speaking from eXPerience with XP only,
    another option is to re-install your OS
    with the BIOS set to RAID initially. Then,
    use F6 to load the RAID device driver.

    You should also ENABLE the RAID Option ROM in the BIOS,
    and invoke it when prompted to enter a CTRL- sequence:
    this will give you an opportunity to confirm that
    each HDD is non-RAID -- a mode that is recognized
    by RAID Option ROMs.

    In that mode, you can still run JBOD
    (Just a Bunch Of Disks = non-RAID)
    because the RAID device driver is also
    programmed to detect and support
    non-RAID HDDs.

    Motherboard vendors should recommend
    this approach, because it can be rather
    tricky to change from IDE to AHCI
    "on the fly" so to speak.

    Many users will balk at the steps
    required to force a different driver
    using the Device Manager method
    described above.

    Forgive me for lacking VISTA experience:
    if the Device Manager method above
    has been made easier, then that is
    also another recommended option.

    Good luck!

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