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Thread: ep45-ud3p and ahci




  1. #1
    Join Date
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    Default ep45-ud3p and ahci

    i am not very familiar with the bios of this board, so i was wondering if anyone can tell me if it has an option to turn on ahci in the sata control, because i am thinking of getting a ssd drive and everyone says make sure that you enable ahci in the bios.
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  2. #2

    Default Re: ep45-ud3p and ahci

    Yes, the UD3P does have an option in the BIOS to enable AHCI. If you are using a SATA drive right now, I strongly suggest using AHCI because it enables NCQ.

    If you already installed your OS without AHCI enabled, you're going to have to find a guide on how to re enable AHCI after installing your OS. If you enable AHCI after installing your OS, you'll probably fail to boot into the OS (blue screen of death most likely).

    If you're going to upgrade to an SSD, definitely enable AHCI before installing your OS.

    2-6 Integrated Peripherals
    SATA RAID/AHCI Mode (Intel ICH10R Southbridge)
    Enables or disables RAID for the SATA controllers integrated in the Intel ICH10R Southbridge or
    configures the SATA controllers to AHCI mode.
    Disabled Disables RAID for the SATA controllers and configures the SATA controllers to
    PATA mode. (Default)
    AHCI Configures the SATA controllers to AHCI mode. Advanced Host Controller
    Interface (AHCI) is an interface specification that allows the storage driver to
    enable advanced Serial ATA features such as Native Command Queuing and
    hot plug.
    RAID Enables RAID for the SATA controllers.
    CMOS Setup Utility-Copyright (C) 1984-2008 Award Software
    Integrated Peripherals
    SATA RAID/AHCI Mode [Disabled]
    SATA Port0-3 Native Mode [Disabled]
    USB Controller [Enabled]
    USB 2.0 Controller [Enabled]
    USB Keyboard Support [Enabled]
    USB Mouse Support [Disabled]
    Legacy USB storage detect [Enabled]
    Azalia Codec [Auto]
    Onboard H/W 1394 [Enabled]
    Onboard H/W LAN1 [Enabled]
    Onboard H/W LAN2 [Enabled]
    Green LAN [Disbabled]
    􀁠 SMART LAN1 [Press Enter]
    􀁠 SMART LAN2 [Press Enter]
    Onboard LAN1 Boot ROM [Disabled]
    Onboard LAN2 Boot ROM [Disabled]
    Onboard SATA/IDE Device [Enabled]
    Onboard SATA/IDE Ctrl Mode [IDE]
    Onboard Serial Port 1 [3F8/IRQ4]
    􀁋􀁌􀁊􀁉: Move Enter: Select +/-/PU/PD: Value F10: Save ESC: Exit F1: General Help
    F5: Previous Values F6: Fail-Safe Default F7: Optimized Defaults
    Item Help
    Menu Level􀁠
    CMOS Setup Utility-Copyright (C) 1984-2008 Award Software
    Integrated Peripherals
    Onboard Parallel Port [378/IRQ7]
    Parallel Port Mode [SPP]
    􀁋􀁌􀁊􀁉: Move Enter: Select +/-/PU/PD: Value F10: Save ESC: Exit F1: General Help
    F5: Previous Values F6: Fail-Safe Default F7: Optimized Defaults
    Item Help
    Menu Level􀁠
    - 53 - BIOS Setup
    SATA Port0-3 Native Mode
    Specifies the operating mode of the integrated SATA controllers.
    Disabled Allows the SATA controllers to operate in Legacy IDE mode.
    In Legacy mode the SATA controllers use dedicated IRQs that cannot be shared
    with other device. Set this option to Disabled if you wish to install operating
    systems that do not support Native mode. (Default)
    Enabled Allows the SATA controllers to operate in Native IDE mode.
    Enable Native IDE mode if you wish to install operating systems that support
    Native mode.

  3. #3

    Default Re: ep45-ud3p and ahci

    Stolen from Hilbert @ Guru3D

    GUIDE - Enabling AHCI mode AFTER Windows 7 Installation

    A little guide:

    I am receiving a lot of emails from users who bought a SSD drive, installed Windows 7 in IDE mode and then realize they need AHCI mode for faster SSD performance. Once you enable that in the BIOS during Windows 7 boot up, the OS will crash.

    The common question is, is there a solve for this ?

    To answer that question (and I do this safely with all Intel ICHR9/10 chipsets) there is a way to safely enable AHCI mode. Here we go:

    1. Startup "Regedit
    2. Open HKEY_LOCAL_MACHINE / SYSTEM / CurrentControlset / Services
    3. Open msahci
    4. In the right field left click on "start" and go to Modify
    5. In the value Data field enter "0" and click "ok"
    6. exit "Regedit"
    7. Reboot Rig and enter BIOS (hold "Delete" key while Booting

    In your BIOS select "Integrated Peripherals" and OnChip PATA/SATA Devices. Now change SATA Mode to AHCI from IDE.

    You now boot into windows 7, the OS will recognize AHCI and install the devices. Now the system needs one more reboot and voilla .. enjoy the improved SSD performance.

    We have not tested this on Vista though.

    Update -- we tested and this tweak works in Vista 100% the same.

  4. #4

    Default Re: ep45-ud3p and ahci

    Buy me a beer ?

  5. #5
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: ep45-ud3p and ahci

    All good now eh?

    Looks like you have all the info you need! Once you get your SSD and get ready to use it, put the SSD into the first Intel SATA port (SATA2_0)

    Then use these BIOS settings as shown above

    Integrated Peripherals


    Intel Controller (Yellow Ports)
    SATA RAID/AHCI Mode (Intel ICH10R Southbridge) ............. AHCI
    SATA Port0-3 Native Mode ................................... Enabled (or Disabled, both will work)

    Gigabyte/J.Micron Controller (Purple Ports)
    Onboard SATA/IDE Device (GIGABYTE SATA2 Chip) ............. Enabled
    Onboard SATA/IDE Ctrl Mode (GIGABYTE SATA2 Chip) ...........

  6. #6
    Ken429 is offline Senior Member
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    Default Re: ep45-ud3p and ahci

    I'm heading down the same path to install an SSD drive. Just curious, in one of the posts I read you advised to make the Start value for Msahci, Pciide and iaStorV all "0". Yet in this post and in the W7 forum it was suggested to only change the Start value for Msahci to "0". It looks like the Start value for Pciide is already set to "0" but the iaStoreV is set to "3". Do I need to go back to IDE mode and make this a "0"? It seems like the system is running ok at this point? I'm cheating a little since I have two similar systems one running in AHCI mode and one in IDE mode. Any suggestions on a good SSD boot drive. I'm leaning towards the Mushkin 60GB with the new controller.

  7. #7
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: ep45-ud3p and ahci

    Enabling all three simply allows a user to switch from all three modes anytime IDE/AHCI/RAID, you can only change the ones you want if you like.

    Enable switching between all IDE/AHCI/RAID modes by changing "Start" Values in these keys to 0
    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

  8. #8
    Ken429 is offline Senior Member
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    Default Re: ep45-ud3p and ahci

    I changed Msahci to "0" and Pciide was already "0". I'm running in AHCI mode with the latest Intel RST drivers 9.6.0.1014 for Windows 7 64-bit. Not that I will want to go to a Raid setup, but... why do I have to go back to the IDE Bios setting to change the iaStorV value from "3" to "0"? I know I'm a pain in the neck and a "slow learner"!

  9. #9
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: ep45-ud3p and ahci

    You don't have to at all if you don't want to, doing so only allows you to later switch to IDE if you want.

    You are not a pain, no problem asking! If you don't ask you might never know, we are happy to help

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