My CPU is throttling in high-FPS scenes in CS2 because the RT620 is too slow. How do I stop the heat soak?

It's honestly ridiculous that a mid-range cooler like this would cause clock fluctuations in a game like CS2. The RT620's 'Silent Mode' caps the fans under 1000 RPM, which is a disaster for high-FPS rendering. My core temps were jumping between 85-92℃, triggering light throttling. I tried capping my FPS at 144, but the added input lag was just unacceptable for a competitive shooter. I ditched the silent presets, plugged the fans directly into the PWM headers, and set a curve that hits 1800 RPM the moment it touches 75℃. AIDA64 confirmed my peak temps dropped from 92℃ to a stable 74-78℃. The first time I booted with this curve, the fans sounded like a jet engine for a second, so I added a smooth start-up ramp to quiet it down. Now it stays at 76℃ and the FPS is rock solid. I've backed up this profile, and the fans are humming along at 1400-1600RPM.