AHCI and SSD's

Discussion in 'Windows 7 Hardware' started by sisyphus, Sep 20, 2009.

  1. sisyphus

    sisyphus New Member

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    According to a bulletin on the OCZ site;
    With AHCI on; my drive score went from 7.1 to 7.3, but my computer became unusable from the same symptoms quoted in the bulletin.
    As for my overall WPI score; it is limited to 4.4 because of the over emphasis on Aero Performance. I have not invested in a graphics card, nor do I need to. If not for the low Aero score I would rate a 5.9; My processor gets a 6.7 and memory, a 5.9 - I'll upgrade the RAM some time soon.
     
  2. loathe

    loathe New Member

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    I have my Vertex 60GB configured to AHCI and my WIE is 7.3. I have no problems with lockups on my SSD, its nothing but bliss. I do use the native Windows driver though as the Intel one slows wiper down to a crawl for me. But in AHCI with newest Intel driver, I get by far the highest benchmark results.
    Sometimes when I access my hard drives, there is a slight lag, but I always thought it was because the drives had to start spinning back up to speed as they are not always being accessed. Maybe its because Im in AHCI.

    Are you using a first or second generation SSD? Thats an interesting bit of text, hadnt seen that before. I guess Ive always just used AHCI rather the IDE mode.
     
  3. sisyphus

    sisyphus New Member

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    Ssd & ahci

    My SSD is also a Vertex 60 with the latest firmware. Sluggish behavior was one of the symptoms I observed using AHCI.
    Now that I have reverted to IDE Mode, the SSD is instantly responsive. The slightly higher (+0.2) performance index using AHCI is a false indicator of real performance. In this case, real-world performance actually suffers considerably.
    As recommended, I also re-set the registry setting for AHCI: Start Value = 3 (disable). Remember that this setting needs to be "0" (enable) if you want to set the BIOS to AHCI mode. Otherwise, you get the dreaded "Blue Screen Of Death". :eek: *

    *Reference: Microsoft kb922976 Error message when you start a Windows 7 or Windows Vista-based computer after you change the SATA mode of the boot drive: "STOP 0x0000007B INACCESSABLE_BOOT_DEVICE"
     
  4. loathe

    loathe New Member

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    Out of interest, what southbridge are you using? I have a ICH9R and dont have the same problem as you. I am however going to run in IDE mode for a while to see if I can notice a difference. You are talking about this key yeh?
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci

    *EDIT* I just looked at your link.

    Thanks for the tip.
     
    #4 loathe, Sep 23, 2009
    Last edited: Sep 23, 2009
  5. sisyphus

    sisyphus New Member

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    Ssd & ahci

    My motherboard uses the nVidia 8200 chipset.

    Computer is a Shuttle SN7800 Kit with:
    AMD Phenom 8750 Triple Core 2.4GHz @2.9GHz
    4GB DDR2 800 RAM
    OCZ Vertex 60 SSD SATA
    WD 250GB HDD SATA
    Sony CD/DVD Drive
    Logitech DiNovo-Edge Keyboard
    Samsung 2443 LCD Monitor

    And yes, that is the correct registry address.
     
  6. sisyphus

    sisyphus New Member

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    Ahci

    I will drop this discussion after this post.
    As far as I can tell, AHCI allows NCQ (Native Command Queing) and hot swap. That's all!
    I found this post on another forum and it backs up the bulletin from OCZ. ie. it's of no use for SSD.
     
  7. prof290546

    prof290546 New Member

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    Stop: 0X0000007B

    During the setup after restarting the system the following error: 0x0000007B (0x80D86DB58, 0xC0000034, 0x00000000, 0x00000000) appears in a blue screen.
    Has anybodý an idea?

    Thank you.

    Ludwig
     
  8. Toptech

    Toptech New Member

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    7B BSOD is commonly seen when the Sata HDD controllers are not loading up correctly, or an OS was installed with HDD running in IDE mode but then changed to SATA/AHCI mode afterwards (and vice versa). I would try changing the mode you are running your HDD in within the BIOS.
     

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