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Enabling SATA AHCI in Win7 64 bit after installation

    Question

  • How do I install and enable AHCI drivers for my sata drives.  They defaulted to IDE and I want to change it.

     

    ASUS M3N72-D

    AMD Phenom II 940 Black Edition (QUad Core 3ghz)

    8GB Ram

    500 Gb SATA Drive

    DVDRW and BlueRay (both SATA)

    nVidia 285 OCX 2gb

    Friday, December 03, 2010 1:04 AM

Answers

  • Here are two links on enabling AHCI after installation.  I followed these steps on my system and did not encounter any problems switching from SATA/IDE mode to AHCI.

    http://www.ithinkdiff.com/how-to-enable-ahci-in-windows-7-rc-after-installation/

    http://support.microsoft.com/kb/922976

    The system uses a default AHCI driver using this procedure.  The system would not allow me to install the AMD AHCI drivers before switching because the hardware could not be found.  After switching I was able to load the AMD AHCI drivers without problem and the system did require another reboot to use the AMD drivers.


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. ”
    Friday, December 03, 2010 3:07 PM

All replies

  • BTW...I changed the registry entry HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\msahci from 3 to 0.  When I try to changed the controller from IDE to AHCI I get an error saying Error loading OS.  If I change it back to IDE, it loads fine.  Help!  Just in case it wasn't clear from the title, I am running Win7 Ultimate 64 Bit.  Thanks in advance :-D
    Friday, December 03, 2010 1:06 AM
  • Download and install the chipset driver from here:

    http://support.asus.com/download/download.aspx?model=M3N72-D&os=30&SLanguage=en-us

    and see if that helps.


    SC Tom
    -There's no such thing as TMI when asking for tech support.

    Friday, December 03, 2010 1:26 AM
  • Here are two links on enabling AHCI after installation.  I followed these steps on my system and did not encounter any problems switching from SATA/IDE mode to AHCI.

    http://www.ithinkdiff.com/how-to-enable-ahci-in-windows-7-rc-after-installation/

    http://support.microsoft.com/kb/922976

    The system uses a default AHCI driver using this procedure.  The system would not allow me to install the AMD AHCI drivers before switching because the hardware could not be found.  After switching I was able to load the AMD AHCI drivers without problem and the system did require another reboot to use the AMD drivers.


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. ”
    Friday, December 03, 2010 3:07 PM