Question / Help I lose FPS when I use two monitors? (Not even recording or streaming)

[Rusteh]

Hi everyone, I've encountered this weird issue.
Normally when I just have one monitor plugged in OBS works perfectly, my frames are high and everything records smoothly.

But when I plug in my second monitor just so I can have discord and other stuff on, my frames suddenly drop (only drops when OBS is open and I go in fullscreen) It's weird because I don't even have to be recording or streaming for this to happen..
I turned on multi-adapter compatibility and it helped just a little bit, but not significantly..

Does anyone have a fix for this?

PC Specs:
http://prntscr.com/gven09

Latest log file (if needed):
https://pastebin.com/ZYe3JcAB

 

[sam686]

Delete your monitor/display capture if your game capture works fine. You may use window capture if needed.

Is one or both of your monitors 120 Hz or higher?

On windows 7: Does turning off windows Aero (try basic theme) fix your performance problem?

If only one monitor is 120Hz and the other monitor is 60Hz, there is a problem with windows DWM/Aero v-sync to a slower 60Hz.

 

[Rusteh]

Delete your monitor/display capture if your game capture works fine. You may use window capture if needed.

Is one or both of your monitors 120 Hz or higher?

On windows 7: Does turning off windows Aero (try basic theme) fix your performance problem?

If only one monitor is 120Hz and the other monitor is 60Hz, there is a problem with windows DWM/Aero v-sync to a slower 60Hz.

Deleted the display capture, had no change.. Window capture only gives me a white screen on the game I want to record (minecraft).

Nope both monitors are 60hz.

Disabling aero has little to no difference, I get great frames without it (only using one monitor of course.)

Got anything else?

 

[sam686]

Using game capture? check if that works without the need for window or monitor capture.

Try to set OBS to 60 fps or lower.

 

[Rusteh]

Using game capture? check if that works without the need for window or monitor capture.

Try to set OBS to 60 fps or lower.

Yup I use game capture.

I tried 60fps (normally have it on 120), but no avail.
I'd really not like to record anything under 60.

Also keep in mind this happens even when Im not recording or streaming (when I go in fullscreen and idle)

 

[BK-Morpheus]

Let me guess:
144Hz or so called "bad for casual streamers" PC Monitor combined with a regular 60Hz Monitor?
If so: Already known problem, as soon as anything with hardware acceleration is opened on the 60Hz Monitor.
https://www.reddit.com/r/nvidia/comments/4f3rfy/problems_with_60hz_and_144hz_dual_monitor_setup/

You can google it, maybe there is som kind of fix or workaround.

Even if you can fix it:
Rendering you scene is done by GPU. I get around 8-10% GPU load from having OBS opened with a scene where there is Webcam+Scrolling Text+Wallpaper+Game.
As soon as I set the framerate from 30 to 60, the GPU load gets higher (of course).
So when you choose crazy settings like 1080p 120fps with NVENC 2-pass and 2 b-frames, It is possible, that your recordings will stutter like crazy.

You know, that viewers don't have the input lag, that the player has?
Best feeling about 144Hz gaming is the fast response, not the smooth framerate. So for video recordings 60fps should be more than enough.

 

[Rusteh]

Let me guess:
144Hz or so called "bad for casual streamers" PC Monitor combined with a regular 60Hz Monitor?
If so: Already known problem, as soon as anything with hardware acceleration is opened on the 60Hz Monitor.
https://www.reddit.com/r/nvidia/comments/4f3rfy/problems_with_60hz_and_144hz_dual_monitor_setup/

You can google it, maybe there is som kind of fix or workaround.

Even if you can fix it:
Rendering you scene is done by GPU. I get around 8-10% GPU load from having OBS opened with a scene where there is Webcam+Scrolling Text+Wallpaper+Game.
As soon as I set the framerate from 30 to 60, the GPU load gets higher (of course).
So when you choose crazy settings like 1080p 120fps with NVENC 2-pass and 2 b-frames, It is possible, that your recordings will stutter like crazy.

You know, that viewers don't have the input lag, that the player has?
Best feeling about 144Hz gaming is the fast response, not the smooth framerate. So for video recordings 60fps should be more than enough.

Nope, like I said both my monitors are 60hz, so it can't be there.

The problem is that when I go fullscreen I start dropping frames without recording or streaming at all. It's just the fact that I have OBS opened..