Question / Help Got new monitor and now OBS lags (MANY PROBLEMS)

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CrustedNut

New Member
I've recently gotten a new monitor with a higher resolution and refresh rate than my previous ( New monitor: 27inch 2560x1440 144Hz), my old one is now to my left and its 24inch 1920x1080 60Hz. Ever since I got this new monitor my OBS videos have been super laggy and low quality. I've adjusted the bitrate, resolution scales etc. however nothing seems to be working. When I'm playing my game has no lag what so ever, however the turnout of the video is absolutely terrible. On my old monitor my videos were smooth and high quality. I've checked the CPU usage and its low, and it seems to remain in 60 fps for the majority of my gameplay, however it stutters and such and it's annoying. I'm running a GTX 1080 with an i7-8700k so I wouldn't think I should be getting issues such as these. Please help :( (I'm on OBS 21.1.0)
 
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n3v3rm1nd

Member
The issue maybe in the different refesh rates. I can't go into detail because I don't know much about the technical issue bu try to run both in 60hz. I somewhere read that using Displayport for both displays works better etc. Just try out things but I too have some issues when I oc my monitor to 74hz and the left is on 60hz.
 
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CrustedNut

New Member
n3v3rm1nd said:
The issue maybe in the different refesh rates. I can't go into detail because I don't know much about the technical issue bu try to run both in 60hz. I somewhere read that using Displayport for both displays works better etc. Just try out things but I too have some issues when I oc my monitor to 74hz and the left is on 60hz.
Click to expand...

I've heard about this problem as well. And have completely taken out my left monitor (the 60Hz one). I also completely reinstalled OBS which bumped it up to version 21.1.2. However, now whenever I open OBS it starts to lag my entire PC, even when I tweak settings and such, to top it off I am not even recording when it lags. I don't know what the problem is now but whenever I have OBS open my computer lags, and as soon as I close it, everything goes back to normal.

IN ADDITION, often times when I'm going through different settings in OBS the lag would get so bad that my computer would literally FREEZE, and then my monitor would go completely black for a few seconds and then later come back on, only to do it again moments later.
 
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BK-Morpheus

BK-Morpheus

Active Member
If the problem still occurs, without the second monitor, than this is not the known multi monitor / mixed refreshrate problem.
Maybe the higher resolution+refreshrate of the new monitor, introduces a GPU bottleneck, which can cause rendering problems in OBS.
You can test this, by limiting your ingame framerate to 60fps (via game settings or RTSS or using 60Hz on the monitor + VSYNC) and reducing details or resolution, until the GPU load stays below ~95%.
 
Arestone

Arestone

New Member
I updated my monitor too, old one was full hd 144hz and this new is 1440p 144hz. My problem is that when i play, my recorded fps drops sometimes to 15fps or something like that. I have tried everything.. I have 6700k and gtx1080, and still cant handle stream. Tried both encoding with no results..

My Gpu usage is almost 100% everytime when i play. Is it rly that 1080 cant handle gaming with 1440p and stream at same time? Even at cpu encoding..
 
BK-Morpheus

BK-Morpheus

Active Member
The process of arranging different sources into a scene and rendering it into a picture (including downscaling, filtering etc.) is done by the GPU, as it is way faster/efficient than the CPU, when it comes to these kind of things.
These frames are then encoded into a video stream, which can be done via CPU or parts of the GPU (NVENC, AMF etc.).

If you allow games to max out the GPU utilization, you risk loosing render performance in OBS. Sadly we can not prioritize OBS over games (we can do it for the CPU, but not for the GPU).

So you need to cap your ingame fps in order to keep some GPU resources for OBS.

A GTX1080 is fine for 1440p gaming at 60fps and in most games even for 4k.
As soon, as high refreshrate monitors comes into play and and the demand for >100fps that goes along with that monitor, a GTX1080 (or in many cases the CPU) will start to struggle in demanding games.

If you then add streaming software on top, it's clear that one side of the medal will suffer (either the ingame performance or the streaming performance).

In times, where high refreshrate monitors are very hyped and most kids and gamers think, that they need them, I would recommend to simply choose between high ingame fps + separate streaming computer, or a 60fps limit in all games, when streaming on the same machine is required.
 
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CrustedNut

New Member
I still have the same problem even after I took out the old monitor. I simply can't record or stream anymore. It's soooooo bad.
 
BK-Morpheus

BK-Morpheus

Active Member
Without a limit, you allow your system to run into a bottleneck situation, which is no big deal, when you just play the game, but when you want to record/stream as well, you need to set a reasonable limit.
Dunno, why a limit of maybe 120fps or even a bit lower should make the game "unplayable".
 
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CrustedNut

New Member
I just find it really hard to believe that this beast computer can't simply record or stream. I literally lose FPS on obs in preview mode, without recording or anything.
 
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CrustedNut

New Member
All of the sudden it now seems like everything is fine? Those last 2 log files I uploaded seemed smooth. I don't know what I changed.
 
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