sata ide or ahci


  1. xxxdannyxxx
    Posts : 3,302
    Windows 7 Home Premium x64 SP1
       New #1

    sata ide or ahci


    Hi guys
    I was told by a friend that changing the sata settings in the bios from ide to ahci can help improve performance so i did.Windows loaded installed the drivers and asked for a reboot which i did all fine. Stupidly it was only then that i decided to look into it and apparently your suppose to change the reg key HKLM/system/currentcontrolset/services/Msahci value to 0 before you enable it in the bios otherwise its BSOD time. Well my laptop loaded the drivers and boots up fine however the value in that reg key is 3 not 0.
    Question is should i change it as your suppose to or leave it alone
    Thankyou
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  3. Brink
    Posts : 72,046
    64-bit Windows 11 Pro for Workstations
       New #2

    Hello Danny,

    Yeah, I would go ahead and change it to 0 and restart the computer to help make sure that it's using AHCI.

    AHCI : Enable in Windows 7 / Vista

    Also look in your Device Manager to make sure that it's show as a AHCI controller like below.

    sata ide or ahci-ahci.jpg

    Hope this helps,
    Shawn
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  4. xxxdannyxxx
    Posts : 3,302
    Windows 7 Home Premium x64 SP1
    Thread Starter
       New #3

    Hi Brink
    Ok changed value to 0 rebooted and checked device manager all seem well.Guess i was just lucky jumping in like that ive read some real horror stories from people not changing reg key first.
    Thankyou for clarification
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  6. Brink
    Posts : 72,046
    64-bit Windows 11 Pro for Workstations
       New #4

    You're welcome.

    Yeah, usually if it didn't work without changing the key first you would just have to reboot and change the BIOS settings back to SATA IDE to be able to change the REG setting.
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  7. xxxdannyxxx
    Posts : 3,302
    Windows 7 Home Premium x64 SP1
    Thread Starter
       New #5

    One other thing are changes to the bios included in system images or are they exempt and keep the settings they currently have.
    great help brink thankyou
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  8. Brink
    Posts : 72,046
    64-bit Windows 11 Pro for Workstations
       New #6

    Since BIOS settings are kept on a memory chip on the motherboard, it will not be included in a system image. A system image only includes the selected hard drives.

    However, you will usually have an option in BIOS to save the settings as a file on your hard drive that you could load from BIOS to use to restore the BIOS settings with.
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  10. xxxdannyxxx
    Posts : 3,302
    Windows 7 Home Premium x64 SP1
    Thread Starter
       New #7

    Thanks brink will do that i think
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  11. Brink
    Posts : 72,046
    64-bit Windows 11 Pro for Workstations
       New #8

    You're welcome. :)
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  12. Aphelion
    Posts : 908
    Windows 7 Home Premium
       New #9

    Brink said:
    You're welcome.

    Yeah, usually if it didn't work without changing the key first you would just have to reboot and change the BIOS settings back to SATA IDE to be able to change the REG setting.

    I can certainly verify this!

    Ap
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