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Thread: New Build: BIOS problem

  1. #11
    Join Date
    Aug 2009
    Birmingham,Great Britain

    Default Re: New Build: BIOS problem

    theres no real benefit from ide to ahci if your running single hdd,but you should see slight improvement if in raid or a larger improvement with an ssd and ahci,if you want to enable it after os install then follow this reg tweak

    1.Exit all Windows-based programs.
    2.Click Start, type regedit in the Start Search box, and then press ENTER.
    3.If you receive the User Account Control dialog box, click Continue.
    4.Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINESystemCurrentControlSetServicesM sahci

    5.In the right pane, right-click Start in the Name column, and then click Modify.
    6.In the Value data box, type 0, and then click OK.
    7.On the File menu, click Exit to close Registry Editor.
    After this you’ll have to restart your computer, go to BIOS and enable AHCI. When you log in to Windows again, you’ll notice the installation of drivers for AHCI. Another restart will be required to finish the driver installation

    the above guide only works for vista/win7 for xp its a bit more complicated but i do have the guide if you want it
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  2. #12
    Join Date
    Apr 2009

    Default Re: New Build: BIOS problem

    I have run tests on both with this setup. As of now I have yet to see the difference but AHCI is suppose to have HotSwap support. Which may be nice to have with an SATAE harddrive. Without an SATAE harddrive it seems to be just a waste of time to me. The speed-test results were not much different. In my tests the faster was with the smart disabled in IDE mode, and it was a very minimal increase in speed.
    Last edited by artdrivers; 07-13-2010 at 09:05 PM.
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  3. #13
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
    Join Date
    Jan 2008
    PCB Island

    Default Re: New Build: BIOS problem

    You can't change to AHCI easily with XP, you need to install the AHCI driver during setup from a floppy disk.

    AHCI also has NCQ with speeds things up, I find AHCI to be much faster on many things on Intel chipsets, it may not make such a difference on AMD though.

    If you want to use AHCI you will have to do another clean install, and load the drivers during the install process.

    Ahh, sorry I reply as I read. Yes in windows 7 you can easily switch to AHCI using the above mentioned method.

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