My CPU is throttling and dropping frames in combat in Like a Dragon: Ishin with a Thermalright PA140. Help?

Fighting through the streets of Kyoto was a struggle because my frames would randomly tank from 60 down to 40, which made me really paranoid about my hardware. I checked the logs and the CPU was hitting 92℃ - 95℃ at peak load, triggering the thermal wall and slashing my clock speeds from 4.8GHz down to 3.2GHz. I tried lowering the in-game settings, but that only dropped the temp by 3℃ and the stutters still happened—software tweaks can't fix a physical heat problem. I went into the BIOS and set a stepped acceleration curve for the Thermalright PA140 fans and added two more intake fans to the front of the case to force more cold air in. Peak temps dropped to 72℃ - 78℃, and the clock speed fluctuations stopped entirely. The fans were screaming at first, but I dialed the speed back to 800 RPM for anything under 60℃ to keep it quiet. The system is running smooth as silk now. Stress tests confirm the thermal curve is flat.