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FPS and Power drops, as GPU peaks..?


Quip

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Hey

I'm still chasing a very odd problem that I'm having.

I got my Zotac RTX 3080 "Gaming" a few days ago, which has replaced my 1080 Ti.
I have used DDU to remove all old drivers and installed nVidia from scratch.
The card is mounted with 2x 8-pin cables, as you can see here.

My problem however, is really really odd.
While playing DCS in VR (which is what I've used basically all the time since getting the new card as it's here that I have the problem).

So what is it? Well...
As you see from this image, the card will suddenly do something which doesn't make any sense at all. It will:

  • spike the GPU at 100%...
  • while lowering (!) power consumption by 1/3
  • while increasing (!) demand on the Bus
  • and the result is a net loss of fps by 2/3 (from 45 to 15)

(Disregard when the graph shows 0 fps as that's when I have the game in the background, those moments are "normal".)

It will stay like the indefinitely, or until I pause the game--which doesn't pause the 3D rendering and VR! After a 5s or so in pause and task switched to a different program, the curves will bounce back and I can go back to the game, for a while until it starts again.

I have also removed all Oculus software following the correct procedures, and reinstalled that too.
I normally use the Quest 2 via a USB cable which is more stable than going by Wi-fi. But I have also tried over Wi-fi, and I have exact same behavior there too, i.e with the VR headset having zero cables going into the PC!

I've stressed the card running MSI Kombustor for 15 min, and it's stressing the card way beyond anything DCS does even in VR, with higher average GPU % load and much higher average Power (W) usage.
I've also started OBS and some other tools simultaneously to push the card even further.
And it's doing this without a hiccup.
Here's an image of this test

I have also run DCS on "pancake" (i.e, not VR) and have zero problems when used like that. The forums are void of this problem as far as I've been able to find.

Even though I really don't think the problem is related to my PSU, just to be sure, I have today replaced my old Corsair CX750 with a brand new Cooler Master V850 Gold V2. And I still have the same behavior...


I would normally expect the W to go hand in hand with the GPU %, but it doesn't. And the behavior is completely random; I'm not doing anything special, or going to a "dense" place. It can happen with me sitting there not doing anything. That means that the load on the CPU and/or GPU aren't changing.

I have tried bumping up the fans to max to see if it was correlated with temperatures, but nope.


Does anyone have a clue as to what this is?

Anyone? Anything?
Help is MUCH appreciated.

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Easy. That took all but 5 minutes.

The Afterburner view is in an image.

And attached a .7z with the

  • full log
  • the DCS .crash file, as well as the .dmp file
  • two of the SRS logs

Since the log uses UTC rather than Zulu, the time to look for is 18:52:30. I've pasted the portion from 18:51:25 till I quit the mission below.

2022-04-12 18:51:25.949 INFO    NET: Current ping: 37.6ms
2022-04-12 18:51:55.961 INFO    NET: Current ping: 36.8ms
2022-04-12 18:52:05.932 WARNING Mission: register_unit(1005810,18188033) : db.units['1005810'] table is missing
2022-04-12 18:52:25.967 INFO    NET: Current ping: 36.9ms
2022-04-12 18:52:56.029 INFO    NET: Current ping: 36.7ms
2022-04-12 18:53:18.227 ERROR   SOUND: invalid source_params(woLA-16800524:aircrafts/f-16/f110ge129_rpm3_front): gain
2022-04-12 18:53:18.227 ERROR   SOUND: invalid source_params(woLA-16800524:aircrafts/f-16/f110ge129_rpm3_side): gain
2022-04-12 18:53:26.039 INFO    NET: Current ping: 37.0ms
2022-04-12 18:54:23.246 WARNING LOG: 1 duplicate message(s) skipped.
2022-04-12 18:54:23.246 INFO    NET: disconnected: 0 
2022-04-12 18:54:23.256 INFO    NET: disconnected from server
2022-04-12 18:54:23.732 INFO    NET: client has stopped
2022-04-12 18:54:23.864 INFO    Dispatcher: Stop

 

Logs.7z

RTX 3080 with Log.png


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  • 2 weeks later...

Install fpsVR and see what it looks like on those graphs.

Meshify C w Noctua Fans, MSI Carbon Z790, 13900KS, 64gb 7200 Gskill, MSI 4090, MSI 240, Sam 1tb m2, Sam 512 m2, Seasonic 1000w, MSFF2 Stick + X56 Throttle, HP Reverb G2, Sony 83in A90J OLED

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That doesn't change or show anything. This is what's important.

  • The game makes the GPU peak at 100% while at the same time drop power to 50%.
  • It's only this game
  • It's not only me

I'm 90% certain this is due to how DCS uses the texture memory.

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43 minutes ago, Quip said:

That doesn't change or show anything. This is what's important.

  • The game makes the GPU peak at 100% while at the same time drop power to 50%.
  • It's only this game
  • It's not only me

I'm 90% certain this is due to how DCS uses the texture memory.

It would confirm if we were experiencing the same issue (I don't think we are). My issue happens on the home screen as well as in play and involves "frame drops" during times of low gpu and cpu usage resulting in only a small drop in total frame rate. It's a small download on Steam, only take a second to install. FpsVR will show a complete "frame drop" as a pink spike rather than a graph that just averages low frame rates. I run motion reprojection (AKA motion vector) to lock it at 45fps and when the pink spikes start hitting it only drops my total frame rate from 45 to around 42ish but it becomes a stuttering mess.

Meshify C w Noctua Fans, MSI Carbon Z790, 13900KS, 64gb 7200 Gskill, MSI 4090, MSI 240, Sam 1tb m2, Sam 512 m2, Seasonic 1000w, MSFF2 Stick + X56 Throttle, HP Reverb G2, Sony 83in A90J OLED

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  • 3 months later...

I have same issue, with Quest 2 and a 2080 SUPER. When i have fps drops, i switch to task administrator and see how i have GPU at 100%, and when i see less than 100% after a time, fps come back to normal status (45fps)

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