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DPC Latency Spike in SLI.

post #1 of 12
Thread Starter 
I really don't know what is causing these DPC latency spikes, whenever I start a GPU intensive game or when I change settings in WoW my DPC latency spikes over 100k sometimes. When this happens, my audio locks up making unable to hear anything untill reboot, or sometimes my system will just freeze.

I have tried Nvidia beta drivers, removing XFI soundcard, restoring default bios ect, and still am having these issues in SLI only, single cards work fine.




EDIT: Narrowed down the culprit to be nvlddmkm.sys, now have no idea on how to handle it.
Edited by OPENbracket - 3/24/11 at 7:17pm
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post #2 of 12
Thread Starter 
Bump, still lost on this issue. Going to try a seperate OS to see if its a driver related problem.
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post #3 of 12
This seems to be a culprit with me as well. Only time i get it though is BFBC2 3 way SLI.
ass eater
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ass eater
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post #4 of 12
I'd try a different SLI bridge, or perhaps try running your cards with a really high fan speed to see if heat might be contributing; if the problem goes away, then you've found your culprit.

Personally I saw this sort of behavior on my old 8800 GTX SLI, and they needed more air to run without causing excessive DPC latency. Cleaning out my case and rerouting cables helped a bit.
Pixel
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Pixel
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post #5 of 12
I've seen this on my setup when I had SLI 460s, but that was only with older drivers.

Have you updated your chipset drivers?
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Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
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Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
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post #6 of 12
Thread Starter 
I have updated the 790i chipset drivers, and also drive multiple video drivers. I just tried out a different SLI bridge with no success, and also had the fan speed at 100% (they went to 35c max). Im going to try a separate OS installation and see how that goes.
Appreciate all the help

EDIT: Reinstalling the OS did not help, going to try anolder Nvidia driver, and if not that then Ill be forced to believe its my mobo.

Editedit: Is it possible that the videocards running at different voltages could be the cause of this problem? The primary card (evga) is at 1.18v while the secondary card (bfg) is set to 1.12v
Edited by OPENbracket - 3/25/11 at 5:38pm
FIRST POST
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CPUMotherboardGraphicsRAM
2500k @ 4.6ghz 1.35v ASUS Z68-V 2x MSI GTX 580s Watercooled @975 mhz 4gb Patriot 
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Mouse
G5 Logitech 
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FIRST POST
(13 items)
 
  
CPUMotherboardGraphicsRAM
2500k @ 4.6ghz 1.35v ASUS Z68-V 2x MSI GTX 580s Watercooled @975 mhz 4gb Patriot 
Hard DriveOptical DriveOSPower
320gb x2 WD Raid1 ASUS BDVD Burner Windows 7 x64 Corsair 750a 
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G5 Logitech 
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post #7 of 12
Thread Starter 
Both cards are at 1.18v, still did not fix the problem
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CPUMotherboardGraphicsRAM
2500k @ 4.6ghz 1.35v ASUS Z68-V 2x MSI GTX 580s Watercooled @975 mhz 4gb Patriot 
Hard DriveOptical DriveOSPower
320gb x2 WD Raid1 ASUS BDVD Burner Windows 7 x64 Corsair 750a 
Mouse
G5 Logitech 
  hide details  
Reply
FIRST POST
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CPUMotherboardGraphicsRAM
2500k @ 4.6ghz 1.35v ASUS Z68-V 2x MSI GTX 580s Watercooled @975 mhz 4gb Patriot 
Hard DriveOptical DriveOSPower
320gb x2 WD Raid1 ASUS BDVD Burner Windows 7 x64 Corsair 750a 
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post #8 of 12
Does it occur no matter which of the cards is the single card? (Have you made sure each card works on its own)?
BlueStorm
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BlueStorm
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post #9 of 12
Thread Starter 
Yes both cards work fine individually
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CPUMotherboardGraphicsRAM
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FIRST POST
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CPUMotherboardGraphicsRAM
2500k @ 4.6ghz 1.35v ASUS Z68-V 2x MSI GTX 580s Watercooled @975 mhz 4gb Patriot 
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320gb x2 WD Raid1 ASUS BDVD Burner Windows 7 x64 Corsair 750a 
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G5 Logitech 
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post #10 of 12
Sorry, these problems can be pretty frustrating.

I notice in your WoW screenshot you have some sort of FPS display. Is that a 3rd party program you always run? If so, maybe try uninstalling it to see if it is interfering with something?

Also, have you tried a single card in either of the slots you are using, to see if the behavior is related to a particular MB slot?

Do you have any other third party programs that might interfere with the graphics system that you could try uninstalling and testing?

Sorry if you've tried any of this already, just trying to help you brainstorm how to diagnose the issue.
Pixel
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Pixel
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