My Huntkey Blizzard T620 can't handle the heat in dense jungle scenes in Horizon Forbidden West, causing huge lags. How do I fix this?

Watching the frame rate tank from 100 FPS down to 45 FPS was an absolute nightmare; it felt like the game was wading through thick mud. Looking at the logs, the Huntkey Blizzard T620 was hitting 94°C to 98°C under load, which immediately triggered the hardware's thermal throttling protection. I first tried capping the CPU power limit to 125W via software, but while temps dropped to 80°C, I lost about 20% of my overall performance, which was a total letdown. I eventually tore the cooler off and swapped the stock paste for a 0.12mm high-conductivity nano-thermal paste and recalibrated the mounting pressure. Checking HWInfo in real-time, the full-load temps were pinned between 72°C and 78°C, and the stutters vanished completely. I actually managed to snap a plastic clip during the reinstall, which caused the heatsink to wobble for the first half hour until I reinforced it with zip ties. Now the clock stays stable at 5.1GHz. After 5 hours of stress testing, there's zero throttling and RAM temps are sitting comfy at 58-63°C.