1. #1

    DPC latency is too high due to the storport.sys (audio pops)

    Hi,

    I'm sorry to post yet another thread on DPC latency, but I tried everything I could find in this forum and nothing works.

    I have a new machine, fresh install of windows 10, and I have an external sound card connected though firewire (focusrite saffire pro 40). I have updated all the drivers to the newest versions, deactivated windows background stuff, no antivirus, power management to performance, etc.

    I'm only using the machine for sound production (ableton live)

    Here is the latency moon report and screenshots.

    Thank you very much for your help

    DPC latency is too high due to the storport.sys (audio pops)-latency-mon-02-pngDPC latency is too high due to the storport.sys (audio pops)-latency-mon-driver-01-pnglatency-mon-01.txt


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  2. #2
    writhziden's Avatar
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      • Sound Card:
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    Re: DPC latency is too high due to the storport.sys (audio pops)

    Can you open Device Manager and show what tabs are available for your firewire device properties (right click the device, and choose Properties)?
    dubreuia says thanks for this.
    I am only a volunteer helping users on the forums. Please wait 72 hours before double posting or PMing for help. I appreciate your patience. :-}

  3. #3
    xilolee's Avatar
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        ASROCK FM2A88M Pro3+ chipset A88X Bolton-D4
      • CPU:
        A10-7800, 4 CPU, 4 thr, 65/45W, FM2+, 28nm, Steamroller/Kaveri
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        10GB (Nanya and kingston ddr3-1333 9-9-9-24)
      • Graphics:
        Radeon R7 720MHz (8 GPU cores, integrated in CPU)
      • Sound Card:
        RealTek ALC662 (integrated in MB)
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        Seagate ST500DM002-1BD142 500GB 7200RPM
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    Re: DPC latency is too high due to the storport.sys (audio pops)

    Hi dubreuia (and writhziden).

    Are you using firefox 52.0.2 x64 (or x86)?

    Quote Originally Posted by dubreuia View Post
    I have updated all the drivers to the newest versions
    How did you update them?
    Did you use special third party software?
    Or did you use only Microsoft device manager and intel driver update tool?
    Or did you check Gigabyte GA-Z270XP-SLI (rev. 1.0) support - downloads (click) for new drivers?
    (There's also a new beta bios, though I won't update it: you could try to use it as a last resource.)
    The mentioned file ohci1394.sys isn't available on windows 10 (at least, it isn't present in my machine).
    Was that installed by Saffire Mix Control 3.7?
    Are you using Saffire Mix Control 3.7?
    Saffire PRO 40 manual says:
    FireWire Driver Latency (Settings Menu)
    The Saffire PRO 40s latency performance will be dictated by the Core Audio buffer size specified in your DAW (Mac,) or as set in the ASIO buffer size (Windows).
    The Firewire Driver Latency affects the performance of the Core Audio or ASIO buffer settings.
    If you are experiencing clicks and pops or audio dropouts, this may be due to certain hardware in your computer that is affecting the performance of audio devices connected via FireWire.
    Rather than removing and replacing hardware (e.g. your graphics card or wireless internet card) trying a longer Firewire Driver Latency setting may solve the problem.
    writhziden and dubreuia say thanks for this.

  4. #4

    Re: DPC latency is too high due to the storport.sys (audio pops)

    Hey guys thanks for the help!

    I found the issue last week, the Samsung NVMe driver version 2.1 was the problem (that's storport.sys). Uninstalling it and reverting to standard windows driver fixes the issue.

    Version 2.2 that was released last week might fix the issue, I haven't tested yet. I now have ****** read / write speed but I don't care all I really need is the sound card.


    Link to another thread citing the issue: Samsung NVME 2.1 driver and terrible DPC Latency | [H]ard|Forum


    I'm leaving this here if anybody else have the problem.

    You can mark this thread as solved.
    writhziden and xilolee say thanks for this.

  5. #5
    xilolee's Avatar
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    • specs System Specs
      • Manufacturer:
        XILOLEE.com
      • Model Number:
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      • Motherboard:
        ASROCK FM2A88M Pro3+ chipset A88X Bolton-D4
      • CPU:
        A10-7800, 4 CPU, 4 thr, 65/45W, FM2+, 28nm, Steamroller/Kaveri
      • Memory:
        10GB (Nanya and kingston ddr3-1333 9-9-9-24)
      • Graphics:
        Radeon R7 720MHz (8 GPU cores, integrated in CPU)
      • Sound Card:
        RealTek ALC662 (integrated in MB)
      • Hard Drives:
        Seagate ST500DM002-1BD142 500GB 7200RPM
      • Power Supply:
        SuperFlower 450W 80+ Platinum (SF-450P14PE)
      • Case:
        Sharkoon VG4-S
      • Cooling:
        Realtek RTL8111GR (NIC integrated in MB)
      • Display:
        Samsung SyncMaster SA100 LS22A100NS-EN
      • Operating System:
        Windows 10 Home/Standard x64

    Re: DPC latency is too high due to the storport.sys (audio pops)

    Glad you solved it!

    But a problem remains: how is it possible you have ohci1394.sys in your system?
    It seems it should be present in Win98 SE, WinMe and maybe in Win2000 and WinXP.
    I have 1394ohci.sys in C:\Windows\System32\drivers, and I don't think they are the same file.
    Last edited by xilolee; 04-09-2017 at 03:22 PM.

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