How to Enable AHCI on a Dell Precision

Written by ryan menezes
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How to Enable AHCI on a Dell Precision
Enable AHCI to speed hard drive access. (hard drive 2 image by Graham Lumsden from

Intel's Advanced Host Controlled Interface (AHCI) helps your computer interact with its hardware. It defines the way your computer works with devices such as your hard drive and optical drive that use a Serial Advanced Technology Attachment (SATA) interface. Enabling the AHCI subsystem lets Windows use the higher speeds that SATA interfaces allow. PCs running Windows, including Dell Precision workstations, enable AHCI through the Windows Registry Editor.

Skill level:


  1. 1

    Exit all programs.

  2. 2

    Type "regedit" in the "Start" menu's search box. This launches the registry editor. A "User Account Control" window may open, asking you for administrative approval. Click "Yes."

  3. 3

    Click on the plus sign next to "HKEY_LOCAL_MACHINE." Click on the plus sign beneath it next to "System," the sign next to "CurrentControlSet" below it and then "Services."

  4. 4

    Click "Msahci." The right pane's contents will change.

  5. 5

    Right-click "Start" in the right pane's "Name" column. Click "Modify."

  6. 6

    Type "0" in the "Value Data" box. Click "OK."

  7. 7

    Click "IastorV" from the left pane. The right pane's contents will change.

  8. 8

    Repeat steps 5 and 6.

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