OBS seems to overuse my GPU and also has a hz rate issue ?

[PantsuTank]

Hey folks,
I've been streaming for a while and some games as of late have been real annoying to get to run properly (Control, Death Stranding, COD MW / Warzone) .
Im using a 2080ti ROG STRIX, 64GB of DDR4 RAM and an i9-9900k. As of late, i've been trying to stream CoD MW (1080p , 90fps lock in game) using OBS at a 1920x1080 rescaled to 720p 60fps.

Issue is , alike the two other games mentionned it seems to be very choppy. Both Control and DS were fixed by setting the monitor rate to 60hz instead of 144hz (both monitors are 144hz, setting the one with the game to 60hz fixes some of it, but obviously isnt the fix id like to stay with since yknow, good monitor stuff).

On top of that, i've also realized that OBS seems to be using 11-23% of my GPU when just opened (no game, no stream active) , wasnt Nvenc supposed to have a minimal impact ?

I'll add my logs here right now, i'd really appreciate the help folks.
Most recent logs

Best,
P.T

 

[qhobbes]

Your monitors' refresh should be a multiple of your OBS Common FPS so try 120 Hz instead of 144 if you want higher than 60 Hz.

AFAIK OBS uses the GPU to render/compose the preview and some other stuff. If you disable the preview, you may notice a difference in GPU usage. I do, but it's a GTX 660M. Also try building a simpler Scene Collection with just game and camera. Don't use Display Capture, build scene with Game/Window/Video Device capture etc. Set your camera to 60 or 30 FPS if possible.

In Windows 10 versions 1809 and newer, we recommend that "Game Mode" be enabled for maximum gaming performance. Game Mode can be enabled via the Windows 10 "Settings" app, under Gaming > Game Mode.

 

[PantsuTank]

I'm back.
The hz change hasnt done anything. The issue has persisted on all the recent games i've been on, even including indie games.

I have in the meantime also tried :
Switching my gpu to the top slot for the 16 lanes which made it worse, even after a full reinstall of the drivers.
Reduced GPU usage in-game, with no result.
I also monitored OBS usage on a 2080ti on my stream today , it was sitting at 53%
I ran the watch dogs legion benchmark mutliple times which helped me show the problem, as my game suffers 0 impact from being streamed, but just OBS seems to be destroying the recording.

I even went to SLOBS to see if it was able to fix the issue, with no positive result, at all.

So yeah, there are huge slow-downs, not only for the display capture but the whole scene. I even went and tested with Game Capture (without display capture on the same scene of course) to no avail.