DPC Latency tracking down the issue (ran a trace)

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grendelrt

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Joined
Jan 26, 2016
Posts
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Hi guys, I have spent the last week reading and trying to track down this issue. I have sound stuttering and popping due to dpc latency when gaming. I have read a bunch of threads on here, so I went ahead and pulled the trace information that is usually requested. I have been using Latency Mon and it shows nvidia drivers having the issue, but I think this is a false positive based on what I have read and something else is causing a conflict with the drivers. When the system is idle Nvidia stuff hits around .6ms alone, when gaming its in the 2.5ms range (using latency mon). I am using HDMI out on the gpu to send out sound.

Things I have tried:

Newest MB Bios
All newest drivers from MB site
Refresh of Windows 10
Driver Verifier flags are off
Multiple Nvidia Drivers
Disabled PCIE power saving in windows and nvidia
Removing/changing slots of SBZ
Turn off speed throttling tech on CPU
Turn off Hyperthreading on CPU
uninstalled all software that isn't required (including Gigabyte software)
updated Intel Drivers from the Motherboard site
disabled the intel i219-v ethernet controller
rearranged SATA HDDs
unplugged SATA DVD Drive
Moved the GPUs from IRQ to MSI
disabling unused hardware
onboard audio and vga are disabled
only m+kb plugged in
disable HPET in bios
Stock and XMP Profile Memory
installing new intel drivers 10.1.1.13
dropping to gen2 pcie

Dropping PCIE to gen2 does help with stopping the sound stuttering but I can still see latency going around 1.2ms.

I have attached my cpu and kernel output from the trace when running 3dmark to imitate gaming environment. Any help would be much appreciated!!!

CPU link: http://www.mediafire.com/download/kdedg37t9mef4al/CPU.zip
Kernel link: http://www.mediafire.com/download/3zy7cepacd8id7x/kernel.zip

Specs of system:
Intel Core i7 6700K
Gigabyte Z170 Gaming 7
GTX 670 SLI
SoundBlaster Z
16GB GSKILL TridentZ
480GB Curcial M500 SSD
Corsair 800D
Corsair HX1000 1000W PSU
 
Hopefully one of the techs more familiar with the DPC latency issues will drop by soon [I support mostly small businesses & family PCs ... rarely see a gaming machine :) ] ...

But I did notice something while I was looking at specs and reviews for gaming laptops/desktops for my daughter: audio pops & video stuttering can strangely enough happen when playing older games on newer systems that have newer nVidia or Radeon graphics cards (or powerful older cards running linked together). When the frame rate goes up too crazily high, it can actually cause symptoms like the pops & stutters. Both the nVidia and Radeon drivers have a setting somewhere in their advanced settings that have to do with "syncing" to the needs of the monitor used: apparently lowering a frame rate that is far too high. Have a look at that while we hope for some help from a DPC Latency experienced tech...
 
Thanks for the reply, I actually RMA'd the board today after I couldnt find a solution. Gigabyte support recommended I sent it back. I did have some reply after I sent it back saying they had the same issue on the same board and they were able to fix some of it by upping the voltage on some things. I dont know if I want to have to do that to make a board stable at stock speeds anyways.
 
I hope the replacement board does better. That's a nice board (NewEgg featured it in a sale recently) ... nice features.

Do you happen to know where the setting is in the drivers for advanced gaming that keeps the frame-rate from going too high? I'll be darned if I can find the information. I'd found it before - I suppose I might be to research that again.
 
Yea I actually got it on the newegg sale. You could use vsync or adaptive vsync to limit the framerate to your monitor refresh. I dont know if there is a framerate cap in nvidias drivers, a lot of newer game have it though.
 

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