Nvidia Drivers Causing Spikes In Latency...

Discussion in 'Videocards - NVIDIA GeForce Drivers Section' started by DJKapitalkev, Jun 12, 2008.

  1. DJKapitalkev

    DJKapitalkev Member

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    cette, see with the onboard sound on this laptop I really cant hear any distortion or problems but the latency spikes are there! I dont hear it until i hook up my soundcard. The reason I know its not my soundcard is if I just run mp3's in the virtualdj program all is fine no distortion or problems latency stays in green! when i load up a video mp4,vob,avi is when the spikes occur and my sound starts to distort.
     
  2. DJKapitalkev

    DJKapitalkev Member

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    passionfruit: the program that lets you change bus latency is double dawg i beleive. I am using vista and that is for XP :( The problem exists when I do not have my soundcard hooked and only happens when I enable a video which requires the video driver.

    sniper: is that driver your using compatible with vista 64?
     
  3. morbias

    morbias Don TazeMeBro Staff Member

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    Have you checked to see what other devices the graphics card is sharing irq's with? Maybe that could be causing the problem.
     
  4. DJKapitalkev

    DJKapitalkev Member

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    IRQ 16 Mobile Intel(R) PM965/GM965/GL960 Express PCI Express Root Port - 2A01 OK
    IRQ 16 NVIDIA GeForce 8800M GTS OK
    IRQ 16 Intel(R) ICH8 Family USB Universal Host Controller - 2834 OK
    IRQ 16 Intel(R) ICH8 Family PCI Express Root Port 1 - 283F OK
    IRQ 16 Intel(R) ICH8 Family PCI Express Root Port 5 - 2847 OK
    IRQ 16 AGERE OHCI Compliant IEEE 1394 Host Controller OK


    all these are on the same IRQ which I know will cause problems if I use my 1394(firewire) sound card! I am still having issues with latency spikes with no soundcard and only when I activate a video file.

    I researched the PCI Latency Tool seems to be something I am looking for but see it isnt designed for PC Express which I beleive is what the GeForce 8800m GTS is.

    Is there a tool similar to the PCI Latency Tool that will allow me to change the bus latency in Vista on my 8800m gts?

    I am using a Gateway P-6860 FX If That Information Is Helpful!
     

  5. jimmor

    jimmor Ancient Guru

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    Are you using 177.26 driver ?

    177.26 driver causes my setup* to show same bad "latency" issue ---> and occasionally got "clicks/pops" on audio of installed TV card !

    Normal "all green" DPC latency display, and no sound problems using my previous 174.74 driver !


    * Observed when using a P5N-E, E4300@3.4Ghz, 8800GT@700/1750/1000 WinXP SP3 setup !

    :)
     
    Last edited: Jun 14, 2008
  6. Cybermancer

    Cybermancer Don Quixote

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    Thanks for the heads up, jimmor! :D

    I am, indeed, using the 177.26 (Vista x64, SP1). To be honest, I'm not that much impressed with them, as everybody else seems to be. Although, my system is running stable, I lost ~ 150 points in 3DMark06 (not so bad) and GRID isn't as fast anymore/hangs for about ~ 0.2 seconds sometimes (bad!)

    I think, I'm going to wait on the 177.34 (if true) and test them. If they're like the 177.26 drivers, I'll go back to 175.51. They were the best for my system so far.

    Thanks again, for mentioning that, jimmor! :D
     
  7. snip3r_3

    snip3r_3 Ancient Guru

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  8. jimmor

    jimmor Ancient Guru

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    No prob's !

    Apart from the "occasional clicks/pops" and "very high" DPC latency readings, 177.26 provided very good IQ and generally appeared to work ok for my setup.

    175.51, and every other previous driver I have tried, is however much better since no "clicks/pops" and DPC latencies always at low green levels!

    The 177.26 issues with my G92 based card must be related to the driver only really being produced (and thus properly compat) to support the newer design GTX260 and GTX280 cards. Possibly even especially tweaked to give excellent gaming performance, regardless of any impact on Audio/Video streaming capabilities ---> meaning, probably nothing more than a GTX260/GTX280 Marketing/PR activity driver?

    In other words, 177.26 was never expected to be a universal driver ---> and presumably, neither will 177.34 be ?

    So unless Nvidia says otherwise, it appears that 175 series are still latest "usable" with G9x or previous cards?

    :)
     
  9. Cybermancer

    Cybermancer Don Quixote

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    I agree with that!

    At least, I know now (or have an explanation for) what caused those high latencies on my PC, to close the circle and get back on topic. ;)
     
  10. Zooze

    Zooze Master Guru

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    This is definately caused by your Creative X-Fi sound card. I had exactly the same problem with mine and went back to onboard sound and my machines is fine. With the X-Fi card in it was cracking and popping. The drivers are just crap for creative at the moment. Dissable your sound card and see what happens. You will also fine when playing things like DVD video with CMSS enabled you will get popping and crackling.

    There is a huge thread here on the creative forums with lots of pissed off people:

    http://forums.creative.com/creativelabs/board/message?board.id=soundblaster&thread.id=71962

    I'd be interested to know what happens, kindest regards

    Zoozer

    EDIT: Another interesting link direct from creative: http://xfi.blogspot.com/2006/06/soundblaster-x-fi-crackling-and.html
     
    Last edited: Jun 15, 2008

  11. DJKapitalkev

    DJKapitalkev Member

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    well i installed windows xp on my system and it seems to have helped dramatically! i still get high jumps but they remain in green when using the video card. I havent had time to test my external soundcard but am happy to see this improvement reguardless.
     
  12. KaaR

    KaaR New Member

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    i have the same problem o dpc spikes (around 1k) in windows 2003 (all editions)

    [​IMG]
    [​IMG]

    Removing NVIDIA Drivers results in no more spikes...

    On XP installations there are no problems, dpc latency hits a miximum of 30.

    My system:

    Intel Core2 Quad Q6600
    Asus P5K Pro
    Nvidia 7900GTX
     
  13. RockMarc

    RockMarc Member Guru

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    Had the same problem with GF8800 GTS (G92) on Vista Ultimate 64 Bit.
    IT IS NVIDIA DRIVER RELATED! And Nvidia is informed about this!

    Well, with the latest driver (177.83) it was reduced a bit, so that the spikes wont hit the yellow mark during office activity. When it comes to games the dpc latencies go up again (not as bad as before but still there from time to time).

    I recommend to install the 177.83 Drivers after a clean deinstall of the old drivers.

    PS: It it definetly NOT my Audigy 2ZS, which i suspected first. (Checked EVERY DEVICE by deactivating them one by one in the device manager. Deinstalling NVIDIA Drivers completly fixed dpc latency issues!

    As Nvidia was officially informed about the issues by manufacturers of other devices, which were suspected to cause those problems, i'm hoping they get their a..es up and finally fix it completly!!!
     
  14. KaaR

    KaaR New Member

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    i just found out that spiking happens when IDLE.

    i run a Prime95 stress test on all the 4 cores of my cpu and wow, spikes went away.

    Energy saving related?
     
  15. mandex

    mandex Master Guru

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    177.83 whql didn't had spikes for me, everything at 30-80
     

  16. Denial

    Denial Ancient Guru

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    Turn off C1E in the bios.
     
  17. Sneakers

    Sneakers Ancient Guru

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    I can reccomend doing that as default, that crap is teh devil!!!
     
  18. Muldurath

    Muldurath New Member

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    Hmmm...this is actually a very interesting find. Has anyone attempted to test this tool against an ATI card to see if those latency spikes occur with them? If not, then this may explain some latency spiking issues on Age of Conan which smell of problems with the client and not the server or internet connection.
     
  19. Grendel_66

    Grendel_66 Master Guru

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    Just to clear this up -- DPC stands for Deferred Procedure Calls. It's a mechanism to allow deferring low priority jobs from a high priority task, mainly used for interrupts (IRQ services are deferred to tasks, hence Windows <> realtime). A higher latency shows an effect only on video/audio. A higher latency means that someone is hogging CPU resources, ie. a driver is creating a lot high priority DPC. Here's a short blurp.
     
    Last edited: Aug 13, 2008
  20. Muldurath

    Muldurath New Member

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    Sure, that part is clear. But on the Age of Conan client, I don't believe the latency meter validates whether or not the interrupts are caused by a connection or a clock interrupt. To me it comes across as a cascading effect, in which some users report the client will switch to a single CPU core (which is a debug feature in the client) after a spike.
     

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