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Thread: AHCI Mode




  1. #1
    Darkling is offline Member
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    Default AHCI Mode

    I have disabled the Gsata2 controller on my GA-P55-USB3 because i don't use the ports and wanted to save out on resources. I have placed 1 single SATA2 drive in SATA_0 and 1 DVDRW in SATA_5.

    Now i want to try the AHCI mode for the P55 embedded controller. Is it possible to have AHCI mode for the HDD and IDE mode for the DVDRW and still have the Gsata controller disabled? I know i can split the modes between the 2 controllers and have the HDD in the Intel and the DVD at the gigabyte sata but it seems too much.

    The question is : enabling AHCI on P55 controller will that result to ports 0-5 to work in AHCI mode? I am having a hunch it applies to 0-3. Am i right?

  2. #2
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    Default Re: AHCI Mode

    If you enable AHCI for your Intel controller, then I think all 6 Intel ports are AHCI enabled. Why is this important? How much money do you think you can save if you are able to mix IDE and AHCI?
    Last edited by ROSESTEEL; 02-11-2011 at 12:16 AM.

  3. #3
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: AHCI Mode

    AHCI enabled will not have a negative effect on your dvd drive. If you have windows install while bios was set to ahci you will need to make registry changes before you can enable ahci.

    Setting the Intel ports to AHCI will set sata2_0 -5 ports.
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  4. #4
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: AHCI Mode

    DVD is fine on AHCI, and that is what you want to use.

    If you installed in IDE mode you'll need to make the following registry changes before you change the BIOS to AHCI

    Vista/Win7 ONLY

    Enable switching between all IDE/AHCI/RAID modes by changing "Start" Values in these keys to 0 (Win 7 / Vista ONLY)
    Code:
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci\Start
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Pciide\Start  
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStorV\Start

  5. #5
    Darkling is offline Member
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    Default Re: AHCI Mode

    Quote Originally Posted by ROSESTEEL View Post
    Why is this important? How much money do you think you can save if you are able to mix IDE and AHCI?
    Computer talk right there... Save money yeah that's why we do what we do, pffff

  6. #6
    Darkling is offline Member
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    Default Re: AHCI Mode

    Quote Originally Posted by Lsdmeasap View Post
    DVD is fine on AHCI, and that is what you want to use.

    If you installed in IDE mode you'll need to make the following registry changes before you change the BIOS to AHCI

    Vista/Win7 ONLY

    Enable switching between all IDE/AHCI/RAID modes by changing "Start" Values in these keys to 0 (Win 7 / Vista ONLY)
    Code:
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci\Start
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Pciide\Start  
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStorV\Start
    Hey LSD, yes i switched to AHCI yesterday and the DVD was fine. I just read a lot about DVD's not working on AHCI. I don't know if it is my idea but my 7200.12 seems quieter now and also i raised a few MB/s in CrystalDiskMark in all tests. So that was an easy and boosting change.

    About the registry i had to change only the msahci key cause i don't have raid.

    Last question i have on this about the Intel AHCI driver. It installed Windows 7 driver but was dated 2006, so i downloaded the driver for my mobo from Gigabyte site. Should i snoop around intel's site to see any update or am i good?

  7. #7
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: AHCI Mode

    Nice to see you switched without any hassles!

    Ya, some drives have issue booting CD/DVD or certain things in AHCI mode, but most are fine. If you happened to have one that causes those issues when trying to boot from CD all you have to do is switch to IDE mode while you do what you need to do, then switch back once you are done.

    Latest Intel drivers are here, I would install them both

    INF Chipset (Use second link)
    http://downloadcenter.intel.com/Sear...lation+Utility

    RAID/AHCI driver (First link)
    http://downloadcenter.intel.com/Sear...l%C2%AE+RST%29

  8. #8
    Darkling is offline Member
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    Default Re: AHCI Mode

    Quote Originally Posted by Lsdmeasap View Post
    Nice to see you switched without any hassles!

    Ya, some drives have issue booting CD/DVD or certain things in AHCI mode, but most are fine. If you happened to have one that causes those issues when trying to boot from CD all you have to do is switch to IDE mode while you do what you need to do, then switch back once you are done.

    Latest Intel drivers are here, I would install them both

    INF Chipset (Use second link)
    http://downloadcenter.intel.com/Sear...lation+Utility

    RAID/AHCI driver (First link)
    http://downloadcenter.intel.com/Sear...l%C2%AE+RST%29
    Thanks so much for your help. No i didn't try to boot on CD while on AHCI mode the install was made in IDE mode, it was months after i started snooping around to maximize the potential of my hardware. Maybe i will clean install now that i have settled with all the settings or you think it isn't necessary?

    EDIT : Intel® Rapid Storage Technology Version: 10.1.0.1008 i think this was on the gigabyte site so i have installed this already
    Gigabyte link : Intel SATA RAID Driver 10.1.0.1008 9.21 MB 2010/12/21
    Last edited by Darkling; 02-11-2011 at 02:54 PM.

  9. #9
    Lsdmeasap's Avatar
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    Default Re: AHCI Mode

    You are fine how you have the OS now! I just mentioned booting from CD/DVD because that is one of the issues that some CD/DVD drives have when using AHCI mode is all.

    Yes, Gigabyte may have updated one or both of those by now, so you may have already installed the latest as you mention.

  10. #10

    Default Re: AHCI Mode

    Quote Originally Posted by Lsdmeasap View Post
    DVD is fine on AHCI, and that is what you want to use.

    If you installed in IDE mode you'll need to make the following registry changes before you change the BIOS to AHCI

    Vista/Win7 ONLY

    Enable switching between all IDE/AHCI/RAID modes by changing "Start" Values in these keys to 0 (Win 7 / Vista ONLY)
    Code:
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci\Start
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Pciide\Start  
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStorV\Start
    Thanks Lsdmeasap! Those three keys worked perfectly for me.

    All I had to do was set the keys. Then enable all AHCI options in BIOS. Restart once to complete the updated Hardware in Windows. And I was finally able to boot into Windows in AHCI mode for the first time.

    Last but not least, I updated Marvell 91xx drivers to 9128 in Windows with the mobo DVD. (So Device Manger would be a happy camper.)

    The reason why is, so I can start Hot swapping HDDs with my two removable SATA drive bays that came built in to my HAF-X case. I can't wait!

    Let alone, now I'm ready to go RAID sometime during the next three to six months.
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