• Guest, The rules for the P & N subforum have been updated to prohibit "ad hominem" or personal attacks against other posters. See the full details in the post "Politics and News Rules & Guidelines."

A call to ALL Nvidia owners - It's time to check our latency

Annisman*

Golden Member
Aug 20, 2010
1,844
70
91
If you've been following the Pascal saga you will know that the cards launched with a number of flaws. One of the flaws that has been found is an increase of DPC latency caused by Nvidia drivers at the kernel level.

At first I assumed that it only affected 10** series cards, but curiosity got the best of me and I also tested my brother's PC with an OG Titan (7*** series) The results are not good. High latency in both idle and gaming situations. This is on a fresh W7 64 install, I have tested the last two Nvidia drivers and they both produce the same latency results, using DDU to make sure everything is clean between driver installs.

I want to know if this is an inherent problem with all nvidia cards.

To check your own results is very easy and quick. Simply download LatencyMon and observe how high the numbers get in both idle and gaming, 5 minutes of both will tell you if you suffer from hidden latency. (Ignore the bottom numbers about pagefaults)

http://www.resplendence.com/latencymon

Please post your results, this is something that all users will want to know as DPC latency can give you ultimately a substandard experience without knowing it (think micro-stutter).

There is a hot-fix driver for 10** series cards as posted in another thread, this resolved most of my issues on my GTX 1080 but as far as I know only 10** series owners can use it. https://forums.geforce.com/default/topic/951723/geforce-drivers/announcing-geforce-hotfix-driver-368-95
 
Last edited:

Bacon1

Diamond Member
Feb 14, 2016
3,430
1,013
91
You might want to show examples of "good" vs "bad" results so people know what to look for.
 

nitromullet

Diamond Member
Jan 7, 2004
9,031
36
91
Doesn't exactly take a rocket scientist to figure out that nvlddmkm.sys is causing latency.

GTX 1070:



edit: I guess I should say "was" causing latency. Here's another screen shot after installing the Hotfix driver:

 
Last edited:

Wall Street

Senior member
Mar 28, 2012
691
44
91
What does the higher latency affect?
It can impact general performance, but the most commonly noted symptom is that your audio will pop because the audio driver will have to wait too long waiting for its deferred procedure call to be processed and the audio buffer will run empty.
 

Beer4Me

Senior member
Mar 16, 2011
564
20
76
Nope, not installing some random software to check this. Have GTX 980 with power profile set to High Performance, have never experienced stuttering or audio drop-outs ever. System config in sig.

Previously I did own a R9 270x, and I did experience stuttering with that card, but it was intermittent and somewhat rare.
 

nitromullet

Diamond Member
Jan 7, 2004
9,031
36
91
It can impact general performance, but the most commonly noted symptom is that your audio will pop because the audio driver will have to wait too long waiting for its deferred procedure call to be processed and the audio buffer will run empty.
Yep, this is compounded when recording or working with multi-tracked audio files. I actually find it odd that none of the youtubers that reviewed Pascal noticed this (or didn't mention it), since a number of them use condenser mics and audio interfaces when making videos.

I haven't had any issues with general usage or gaming, but the first time I fired up Ableton Live after installing my Pascal card it was clear that something was amiss with the latency. It's possible that some youtubers have dedicated rigs for making their videos, but I still find it hard to believe that none of them ran into any issues.
 

railven

Diamond Member
Mar 25, 2010
6,604
556
126
I'm bored, I'm running the test.

EDIT:

Seems fine for me

 
Last edited:

nerp

Diamond Member
Dec 31, 2005
9,834
76
91
Looks like the issue is being resolved with newer drivers out today and going forward so pretty much a non-issue (unless it's not fully fixed yet).
 

Annisman*

Golden Member
Aug 20, 2010
1,844
70
91
Yeah, after discovering the OG Titan had latency I wanted to know how deep the rabbit hole really went.
 

Raising

Member
Mar 12, 2016
120
0
16
If my 1080 is idling at low clocks there's latency spikes with the latest drivers, doesn't happen when idle clocks are higher if I change my desktop from 120 to 144hz.

I'll keep my desktop at 120hz, haven't notice any "lag" or audio problems so far.
 

Joepublic2

Golden Member
Jan 22, 2005
1,114
6
76
My 970 isn't causing any latency spikes playing witcher 3. Windows 10 running latest 368.81 drivers.
 

BFG10K

Lifer
Aug 14, 2000
21,786
752
126
Results from my original 6GB Titan (driver 350.12):



I don't have any issues in games though, but maybe once a week I'll get a single stutter in iTunes music playback.
 

hawtdawg

Golden Member
Jun 4, 2005
1,223
7
81
I've noticed DPC latency problems since at least the 7xx series. This problem people are saying exists with the 1xxx is no different that what I've seen the entire time I've been using Nvidia cards since Kepler. I've had SLI the whole time so I don't know if that was a factor. I've never had judderless/stutterless Flash playback through a browser, and i think it could be a cause. I've never noticed it having an effect on gaming/sound cutouts though.
 
Last edited:

kagui

Member
Jun 1, 2013
78
0
0
theory: GDRR5X increase latency
doubling the data before moving it, increase latency.
No data just a theory.
Easy way of testing if you are gonna have problems test, SVP media player latency test.
 
Last edited:

Madpacket

Platinum Member
Nov 15, 2005
2,068
326
126
One thing that would be interesting to measure - if this DPC latency affects professional gamers in any way? Wonder if there's a way to measure that?
 

dogen1

Senior member
Oct 14, 2014
739
40
91
My pc is showing high interrupt to process latency(dual core pentium + gtx 950). I haven't noticed any issues though.
 

thxdd

Member
Sep 24, 2005
83
21
81
With hotfix drivers 368.95, I am still seeing huge latency spikes - single 1080.
 

railven

Diamond Member
Mar 25, 2010
6,604
556
126
Does this have anything to do with what type of audio configuration you may use?

For example, I use dedicated hardware (not onboard) which has it's own processing units (ie not relying on CPU clocks).

Just curious.
 

ASK THE COMMUNITY