Nvidia acknowledged DPC latency issue - help me with your results

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Tiberiusmoon
Posts: 147
Joined: 10 Feb 2023, 05:05

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by Tiberiusmoon » 21 May 2023, 08:27

Yeah, powersaving increases latency.

When you enable maximum power mode in GPU settings it decreases a lot.

Image

Its why I use normal over saving mode in global and max for individual games.

rvteen
Posts: 15
Joined: 06 May 2023, 09:38

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by rvteen » 22 May 2023, 01:10

Tiberiusmoon wrote:
21 May 2023, 08:27
Yeah, powersaving increases latency.

When you enable maximum power mode in GPU settings it decreases a lot.

Image

Its why I use normal over saving mode in global and max for individual games.
not useful for me,i tried everything

bumbeen
Posts: 84
Joined: 25 Apr 2023, 14:35

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by bumbeen » 22 May 2023, 04:16

rvteen wrote:
22 May 2023, 01:10
Tiberiusmoon wrote:
21 May 2023, 08:27
Yeah, powersaving increases latency.

When you enable maximum power mode in GPU settings it decreases a lot.

Image

Its why I use normal over saving mode in global and max for individual games.
not useful for me,i tried everything
Did you try running a game in windowed mode in the background?

sherifmagdy32
Posts: 121
Joined: 08 Jan 2022, 23:43

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by sherifmagdy32 » 23 May 2023, 20:01

I have Firefox opened have multiple tabs and watching twitch streams
and gpu on idle
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Slender
Posts: 573
Joined: 25 Jan 2020, 17:55

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by Slender » 24 May 2023, 00:24

sherifmagdy32 wrote:
23 May 2023, 20:01
I have Firefox opened have multiple tabs and watching twitch streams
and gpu on idle
you have very very big latency with your usb controller.

empleat
Posts: 149
Joined: 28 Feb 2020, 21:06

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by empleat » 26 May 2023, 18:24

They did now? :D Well but they won't fix it anyways, maybe in 2 years or so, when rolling some new drivers or something... NVCleanInstall from techpowerup (USE DDU in safe mode and made system backup before installing) could help some, although this sounds pretty serious! Also here you have second thread might want to check this out (for running GPU at P0 state, probably want to undervolt for that also if you decide to run it like this 24/7): viewtopic.php?f=10&t=11445. There is utility to switch this on/off, but you need to restart PC I think so it cannot be dynamically used per game etc. https://github.com/auraside/HoneCtrl, also you can enable in bios some 24-119 entries or how it called! Try MSI-X on off, or tweaking related settings, or bios settings! Probably won't help, but it is worth as shot, since who knows what this issue is caused by! And if it is interrupt related, also you can use intel affinity tool and put your GPU maybe to more CPU cores, it won't help probably with lower DPC latency much, could help bit! Don't forget to use ultimate power plan with disable idle saver and 0.5ms timer resolution! Or try different timers Windows uses... These are longshot at best... Also lowering overall DPC latency and disabling C-states, speed-step etc. in BIOS could mitigate overall issues with DPC latency, if you have it from other sources: it can exacerbate problem! You can check my guide for optimizing it in my signature below, all I talk about here in my guide... Overclocking CPU and RAM also can't hurt! And make sure you use GPU scaling override settings of PC games for better fps and consistency (but has slightly higher input lag, but it is worth it)!

sherifmagdy32
Posts: 121
Joined: 08 Jan 2022, 23:43

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by sherifmagdy32 » 28 May 2023, 23:30

Slender wrote:
24 May 2023, 00:24
sherifmagdy32 wrote:
23 May 2023, 20:01
I have Firefox opened have multiple tabs and watching twitch streams
and gpu on idle
you have very very big latency with your usb controller.
Well the mouse is running at 8K pooling rate probably the reason
and this is not high it used to be so far worse took me a lot of time
to tweak the system to this level and loving it right now very consistent.

if you have any suggestions that might help feel free to let me know

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RealNC
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Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by RealNC » 21 Nov 2023, 11:18

I believe this has been fixed now a couple driver releases ago?
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Slender
Posts: 573
Joined: 25 Jan 2020, 17:55

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by Slender » 22 Nov 2023, 19:43

RealNC wrote:
21 Nov 2023, 11:18
I believe this has been fixed now a couple driver releases ago?
it not instant spikes to 130-220 dpc anymore, but it not better then old driver like 472.12.

sherifmagdy32
Posts: 121
Joined: 08 Jan 2022, 23:43

Re: Nvidia acknowledged DPC latency issue - help me with your results

Post by sherifmagdy32 » 26 Nov 2023, 18:26

This is by Savitarax
"figured this would be helpful to anyone who might be in a similar boat.
Nvidia has a bug with their gpu's where if you set the voltage above around 1000mV you can trigger a dpc latency spike of over 150+ microseconds every single time you run a test. This doesn't seem to be an overclocking or instability issue because I can set the frequency stupidly high in relation to how little voltage I am getting and still not get the DPC latency spike so long as I'm not over 1000 mV ish.

Here's a video I made demonstrating it.
https://youtu.be/4P3BX14uBMc"

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