Enable ahci in Windows 7

Enable ahci mode after modifying the Registry

1. Click the start button, type regedit (1) in the search box, and press the Enter key to open the registry editor window. Windows 7 does not display the "run" command by default in the "Start" menu, but it can be replaced by the search box (or press the Windows key + r key directly ).

2. In the left-side title bar of the registry editor window, Locate the HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ msahci branch, and double-click Start in the right-side window ".

3. In the "Edit DWORD Value" dialog box that appears, change the value from 3 to 0 (for example, 2) in the "value data" box and click "OK.

4. close the registry editor window and restart your computer.

5. When the computer is restarted, enter the BIOS settings page and change the hard disk to ahci mode. For example, for the author's computer, press the F1 key to enter the BIOS when starting the computer, and select devices → ata drives setup → configure SATA as → ahci (3) in sequence ), press F10 to save and exit the BIOS.

After you modify the registry and enable the hard disk ahci mode as described above, the system can be started normally without reinstalling the system. Although the startup speed of the computer will not change, when copying a large number of files, we can see a certain acceleration effect.

Summary:

Of course, you should pay attention to the specific operations.

The shortcut keys for entering the BIOS for different boards are different from those for adjusting the ahci In the BIOS. You can refer to the user manual attached to the motherboard for confirmation.

In general, the hard disk ide mode is enabled by default in bios, and ahci is short for the advanced host controller interface, which is an Intel-dominated technology, it can increase the speed of the SATA hard disk to a certain extent. We recommend that you enable it.

In Windows Vista SP1 and later versions, after the hard disk is changed to ahci mode in bios, the system automatically installs the driver. However, if you are using an OS earlier than Vista SP1, You need to manually load the ahci driver through the installation disc of the Windows system when starting the computer. If you do not have a Windows installation CD, first switch back to the IDE mode, start the computer, download and install the ahci driver, and then enter the BIOS to change the hard disk to the ahci mode.