FPS Drop Preview/Record. Need help.

rockbottom said:
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Evaluate your computer's hardware capabilities | Cinebench from Maxon

Cinebench is a free test suite that utilizes the power of Redshift, Cinema 4D's default rendering engine, to evaluate your computer's CPU and GPU…
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Regarding the program you sent — it’s not working for me. The test reaches the end and just freezes there without finishing. As for the temperatures, everything seems okay. I tested it on The Witcher 3 with everything set to ultra and ray tracing enabled, while recording at the same time. Just as a stress test to push it to the limit. Obviously, it's an overload, but it's perfect for checking the temps.
 

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Not finishing should tell you something. Not even running the throttle or stress tests.

File > Advanced Benchmark. If it passes that, 30 minute stability will really test your cooling solution.

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I ran it on my system. Cinebench is fine. Single Thread Scored 610. Your CPU should be somewhere around 550-560 or better in the ST test. That 417 indicates throttling.
 
To add, I should not be doing stress tests during my long term stability test that is now in it's 286 day. Anyway, it passed with flying colors.
 
Okay, as promised, I'm back after changing the CPU—replaced the i5-13500 with an i5-14600KF. Guess what changed? That's right, nothing. The CPU wasn't the problem. I'm gradually starting to lose my sanity.
 
UPDATE:
Well, I finally managed to fix the problem described in this thread — at least on my affected systems.

After all the driver changes, Windows reinstalls, hardware replacements and settings experiments, the practical solution turned out to be changing how completed GPU frames are handed to OBS. I made an experimental fork that adds a small ready-frame queue for Game Capture and DXGI Desktop Duplication.

The long periods where the preview and recording suddenly looked like 30–40 FPS are now gone in my tests. Rogue Trader source improved significantly. Very short isolated hitches may still happen, so I am not claiming this will fix every type of stutter on every PC.

Source code, build instructions and a Windows installer are here:
https://github.com/veelasama/obs-studio-capture-stutter-fix

The installer is unsigned, so Windows SmartScreen will show an unknown-publisher warning. The release includes a SHA-256 checksum, and everything can also be built directly from the public source.

OpenAI Codex assisted with the code investigation and implementation, and I manually reproduced and tested the changes.

If anyone here has the same specific symptoms, I would be interested to hear simply whether it helped or not.

A quick note to the moderators: if the repository link, project name, or any part of this post conflicts with the forum rules, please let me know and I will edit it or remove the link immediately. I would really prefer to preserve the thread because it documents a real long-running capture problem, extensive testing, and a possible solution that may help other affected users. I am not trying to present this build as official or use the forum for promotion.
 
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