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Thread: ahci mode for ssd




  1. #1
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    Default ahci mode for ssd

    Hi ive just been getting my first ssd drive a Samsung 840 evo but the magician software I get with it is telling me I need to activate ahci mode for the best performance
    My motherboard is a gigabyte G31M-ES2L and does not have an option in the bios to change it
    The ssd is working but I just feel its not as fast as it could be and the software is sort of confirming this
    ahci mode for ssd-untitled-jpg

  2. #2
    parsec's Avatar
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    Default Re: ahci mode for ssd

    You will lose some performance on any drive (HDD too) without AHCI, actually the NCQ feature of AHCI.

    The SATA chipset on your board, the South Bridge: Intel® ICH7, does not support AHCI, and you don't have that option in your BIOS.

    The only fix for that I've seen is a modification to two files in the installation program. But I don't see the ICH7 version listed among the chipsets that this mod works with. The ICH7R version listed supports RAID, which also supports all the features of AHCI.

    You can check out this mod in the link below, but you are probably out of luck with your ICH7.

    Intel AHCI/RAID Drivers » Modded Intel AHCI and RAID Drivers

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    Default Re: ahci mode for ssd

    Thanks for the reply parsec I thought as I couldn't find a solution anywhere this might be the case the question is would replacing the motherboard be worth the performance gain I would get on my ssd esp as it would mean a new cpu to go with it as its a 775 socket and looking on ebuyer there wastnt a lot of choice

  4. #4
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    Default Re: ahci mode for ssd

    Whether or not it is worth getting a new board and CPU just for the SSD depends upon what you use the PC for.

    If you are constantly doing a lot of IO from the SSD, then a new board (with SATA III too) will speed things up, but the difference will normally be a matter of several seconds for the typical user. SSDs are so much faster than HDDs even without AHCI/NCQ, you won't see a huge difference changing to a new board and CPU.

    If you know someone that uses SSDs with a new, SATA III board, see how their system is and if it is much faster than yours. Only you can decide if it is worth it to you.

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    Default Re: ahci mode for ssd

    For about $50 - $75, you could buy a used P35 motherboard from CraigsList, ebay, or locally.
    My Samsung 840 Pro and 830 ssd's have excellent performance in my P35-DS3L, P35-DS4 and EP45-UD3P systems.
    Obviously my systems are somewhat limited by each board's sata2 bandwidth, but this is not a problem.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  6. #6
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    Default Re: ahci mode for ssd

    Prof Jim, you're recommending those boards because they have AHCI support, correct?

    meballsa, any socket 775 boards that have Intel RAID support will also have AHCI support, so finding RAID support will also tell you it will have AHCI support.

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    Default Re: ahci mode for ssd

    Quote Originally Posted by parsec View Post
    Prof Jim, you're recommending those boards because they have AHCI support, correct?

    meballsa, any socket 775 boards that have Intel RAID support will also have AHCI support, so finding RAID support will also tell you it will have AHCI support.
    Yes, the lower end P35-DS3L bios allows you to enable or disable AHCI mode, but it does NOT support raid mode.
    I'm not familiar with the features or specs for P31, G31, G33, Q33 or Q35 motherboards.

    At the GIGABYTE - Motherboard - Socket 775 web page you can click on P35 link which will then include a list of all of the Gigabyte P35 models with additional links to each model's web page where you can check features, specs, and download the motherboard's user manual for more detailed information.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


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