How do I stop CPU throttling during stealth scenes in Splinter Cell?

I was losing immersion in Splinter Cell stealth scenes because my CPU dropped from 5.2 to 3.8 GHz due to heat. I tried maxing fans to 1800 RPM, but the noise was unbearable and it barely helped. I used GamePP Fan Curve Configuration to set 70°C to 1400 RPM and 80°C to max. AIDA64 confirmed the temp dropped to 78-82°C and the frequency held at 5.0-5.2 GHz. This setup saves your immersion and performance.