Question / Help OBS open(not recording or streaming) drops FPS in-game

Interesting, I seem to have the same issue using the old OBS when pressing "preview" or starting the encode. But with a Fury and that seems rather strange to me considering we have different GPUs.
 
For everyone in general, I saw some replies in other threads here suggesting that having the "Multi-adapter Compatibility" setting enabled in Game/Window Capture sources could cause FPS drops like this. Check on that?

For @Cedzilla specifically (though the advice may apply to others), I find these lines in your log interesting:
22:27:49.324: source 'Banner Image' (image_source) created
22:27:49.331: Last log entry repeated for 983 more lines
22:27:49.413: Last log entry repeated for 13409 more lines
22:27:49.413: source 'The Stream is Starting Soon' (text_ft2_source) created
22:27:49.417: Last log entry repeated for 590 more lines
22:27:49.417: source 'Scroll' (scroll_filter) created
22:27:49.487: Last log entry repeated for 10984 more lines
22:27:49.487: source 'I'll Be Right Back' (text_ft2_source) created
22:27:49.487: Last log entry repeated for 9 more lines
Click to expand...
The bold emphasis is mine, but the log entries here are sequential and not edited by me.

Also your remarks:
Cedzilla said:
Same thing as my other scenes
Click to expand...

Cedzilla said:
Alright so I already have my window capture in a separate scene, [...]
Click to expand...

@Sapiens had suggested to try a new scene collection. Sources within a scene collection are global by default in OBS Studio (see here and here), meaning that sources in other scenes within a collection could affect performance.

Set up a new scene collection, and set up a new scene within that collection. Test to see if your FPS are affected the same or differently. Record or stream a few minutes, and then stop recording or streaming to generate a complete log, and then post that log. If your issues diminish or disappear, then it's possible that your scene or scene collection had duplicate sources instead of reusing existing sources.
 
Had the same problem as OP, but with Minecraft. And I found a solution that worked for me.

My FPS in Minecraft would drop from 500 to 24 as soon as I would startup OBS (v20.1.3) and run Minecraft in Fullscreen mode. Running Minecraft in Windowed Mode with OBS open would give me around 350-400fps. I don't like playing games in Window Mode as there usually is input lag, so I was getting really frustrated.

After fiddling around with the OBS settings, I found a solution that worked at least for me:
  • Right click on the source (Game Capture in my case)
  • Click on "Properties"
  • Do check the checkbox "Multi-adapter Compatibility"
I have no idea why this did work. I never had this function enabled. (Had to format/reset my PC couple of days ago) and then this problem occurred all of the sudden.
 
I have the same problem now in 2020 when i launch obs without recotding and streaming i get like 30% of fps lose any solution for it?
 
Same problem here. Opening obs drops about 20% of my current fps. I’m running on a 10900k with a 3090 and 32 gigs of ram. Running on a dual 1440p monitor setup.
 
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