In case you missed it today, there is an option to limit your FPS in the .ini files. Details in the comments : r/Rainbow6TTS
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GitHub - Drewskay/r6fpsunlocker: FPS Unlocker For Rainbow Six Siege
In Game FPS Limiter. I asked for this years ago. : r/Rainbow6TTS
Custom FPS Limit in Rainbow 6 Siege - No Additional Software Needed - YouTube
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How to cap your frame rate on PC Instruction guide : r/Rainbow6
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